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    Human tendon, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human tendon, light micrograph. Haematoxylin and eosin stain.
    Light micrograph of an artery vascular cross section. — Stock Photo
    Light micrograph of an artery vascular cross section.
    Light micrograph of human testis showing spermatogonia, spermatocytes in meiosis, spermatids, and spermatozoa. Haematoxylin and eosin stain. — Stock Photo
    Light micrograph of human testis showing spermatogonia, spermatocytes in meiosis, spermatids, and spermatozoa. Haematoxylin and eosin stain.
    Illustration of platelets (thrombocytes) that have been activated (with extensions) and those that are non-activated. Platelets are part of the blood. When a blood vessel is damaged, the platelets become activated and secrete chemicals that cause the — Stock Photo
    Illustration of platelets (thrombocytes) that have been activated (with extensions) and those that are non-activated. Platelets are part of the blood. When a blood vessel is damaged, the platelets become activated and secrete chemicals that cause the
    Hair follicles. Coloured scanning electron micrograph (SEM). The outer layer of hair (the cuticle) has overlapping scales of keratin. These scales are thought to prevent hairs from matting together — Stock Photo
    Hair follicles. Coloured scanning electron micrograph (SEM). The outer layer of hair (the cuticle) has overlapping scales of keratin. These scales are thought to prevent hairs from matting together
    Cross section of human cartilage and bone, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Cross section of human cartilage and bone, light micrograph. Haematoxylin and eosin stain.
    Illustration of platelets (thrombocytes) that have been activated (with extensions) and those that are non-activated. Platelets are part of the blood. When a blood vessel is damaged, the platelets become activated and secrete chemicals that cause the — Stock Photo
    Illustration of platelets (thrombocytes) that have been activated (with extensions) and those that are non-activated. Platelets are part of the blood. When a blood vessel is damaged, the platelets become activated and secrete chemicals that cause the
    Human brain with highlighted corpus callosum, also known as callosal commissure, illustration. It is a wide, thick nerve tract connecting the left and right cerebral hemispheres. — Stock Photo
    Human brain with highlighted corpus callosum, also known as callosal commissure, illustration. It is a wide, thick nerve tract connecting the left and right cerebral hemispheres.
    Human brain with highlighted corpus callosum, also known as callosal commissure, illustration. It is a wide, thick nerve tract connecting the left and right cerebral hemispheres. — Stock Photo
    Human brain with highlighted corpus callosum, also known as callosal commissure, illustration. It is a wide, thick nerve tract connecting the left and right cerebral hemispheres.
    Human brain with highlighted corpus callosum, also known as callosal commissure, illustration. It is a wide, thick nerve tract connecting the left and right cerebral hemispheres. — Stock Photo
    Human brain with highlighted corpus callosum, also known as callosal commissure, illustration. It is a wide, thick nerve tract connecting the left and right cerebral hemispheres.
    Small intestine. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( pink) is exposed to food — Stock Photo
    Small intestine. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( pink) is exposed to food
    Computer illustration of the basal ganglia, showing caudate nucleus (green), putamen (yellow), and lateral ventricles (blue). — Stock Photo
    Computer illustration of the basal ganglia, showing caudate nucleus (green), putamen (yellow), and lateral ventricles (blue).
    Human smooth muscle, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human smooth muscle, light micrograph. Haematoxylin and eosin stain.
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid — Stock Photo
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid
    Human eye nerve, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human eye nerve, light micrograph. Haematoxylin and eosin stain.
    Mitochondria cross-section, illustration. Mitochondria are organelles found in the cytoplasm of eukaryotic cells. They oxidise sugars and fats to produce energy in a process called cellular respiration — Stock Photo
    Mitochondria cross-section, illustration. Mitochondria are organelles found in the cytoplasm of eukaryotic cells. They oxidise sugars and fats to produce energy in a process called cellular respiration
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid — Stock Photo
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid
    Tendon, coloured scanning electron micrograph (SEM), showing bundles of collagen fibres. The parallel alignment of the fibres make tendons inelastic but flexible. Tendons attach muscle to bone — Stock Photo
    Tendon, coloured scanning electron micrograph (SEM), showing bundles of collagen fibres. The parallel alignment of the fibres make tendons inelastic but flexible. Tendons attach muscle to bone
    Hair follicles. Coloured scanning electron micrograph (SEM). The outer layer of hair (the cuticle) has overlapping scales of keratin. These scales are thought to prevent hairs from matting together — Stock Photo
    Hair follicles. Coloured scanning electron micrograph (SEM). The outer layer of hair (the cuticle) has overlapping scales of keratin. These scales are thought to prevent hairs from matting together
    Intestinal lining. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( yellow) is exposed to food — Stock Photo
    Intestinal lining. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( yellow) is exposed to food
    Human brain with highlighted corpus callosum, also known as callosal commissure, illustration. It is a wide, thick nerve tract connecting the left and right cerebral hemispheres. — Stock Photo
    Human brain with highlighted corpus callosum, also known as callosal commissure, illustration. It is a wide, thick nerve tract connecting the left and right cerebral hemispheres.
    Amygdala of the brain, illustration. The amygdala (red) is part of the brain's limbic system and plays a key role in processing emotions. — Stock Photo
    Amygdala of the brain, illustration. The amygdala (red) is part of the brain's limbic system and plays a key role in processing emotions.
    Illustration of the amygdala in the brain, and a close-up view of its neurons. The amygdala (red) is part of the brain's limbic system and plays a key role in processing emotions. — Stock Photo
    Illustration of the amygdala in the brain, and a close-up view of its neurons. The amygdala (red) is part of the brain's limbic system and plays a key role in processing emotions.
    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease. — Stock Photo
    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease.
    Multiracial female athletes in disposable masks squatting against rough post while looking away during workout in urban park — Stock Photo
    Multiracial female athletes in disposable masks squatting against rough post while looking away during workout in urban park
    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease. — Stock Photo
    Substantia nigra. Illustration showing a healthy substantia nigra in a human brain. The substantia nigra plays an important role in reward, addiction, and movement. Degeneration of this structure is characteristic of Parkinson's disease.
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut — Stock Photo
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut
    Rear view of a woman sitting in a deck chair on the beach at sunset, Thailand — Stock Photo
    Rear view of a woman sitting in a deck chair on the beach at sunset, Thailand
    Boy spraying hand sanitser on his hand — Stock Photo
    Boy spraying hand sanitser on his hand
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut — Stock Photo
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut
    Lung bronchiole. Light micrograph of a section through lung tissue and a bronchiole. Bronchi form branches from the trachea and gradually diminish in diameter with increasing branching into bronchioles within the lung — Stock Photo
    Lung bronchiole. Light micrograph of a section through lung tissue and a bronchiole. Bronchi form branches from the trachea and gradually diminish in diameter with increasing branching into bronchioles within the lung
    Cross-section of spinal cord, light micrograph. — Stock Photo
    Cross-section of spinal cord, light micrograph.
    Illustration of the human brain with highlighted superior frontal gyri, also known as marginal gyri. It is located in the frontal lobe and is associated with self-awareness and laughter. — Stock Photo
    Illustration of the human brain with highlighted superior frontal gyri, also known as marginal gyri. It is located in the frontal lobe and is associated with self-awareness and laughter.
    Human brain with highlighted middle temporal gyrus, computer illustration. It is located in the temporal lobe and is involved in recognition of known faces and accessing word meaning while reading. — Stock Photo
    Human brain with highlighted middle temporal gyrus, computer illustration. It is located in the temporal lobe and is involved in recognition of known faces and accessing word meaning while reading.
    Cutibacterium (formerly Propionibacterium) bacteria, computer illustration. These are an example of non-pathogenic bacteria found on human skin, where they are well adapted to the natural acidity. An example is Cutibacterium acnes — Stock Photo
    Cutibacterium (formerly Propionibacterium) bacteria, computer illustration. These are an example of non-pathogenic bacteria found on human skin, where they are well adapted to the natural acidity. An example is Cutibacterium acnes
    Striated muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through striated skeletal muscle. The striated banding-pattern of the muscle fibrils is seen — Stock Photo
    Striated muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through striated skeletal muscle. The striated banding-pattern of the muscle fibrils is seen
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( brown) is an insulating fatty layer that surrounds the myelinated nerve fibres (blue) — Stock Photo
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( brown) is an insulating fatty layer that surrounds the myelinated nerve fibres (blue)
    Striated muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through striated skeletal muscle. The striated banding-pattern of the muscle fibrils is seen — Stock Photo
    Striated muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through striated skeletal muscle. The striated banding-pattern of the muscle fibrils is seen
    Human brain with highlighted precentral gyrus, computer illustration. It is located in the posterior frontal lobe and is the site of the primary motor cortex, the Brodmann area 4. — Stock Photo
    Human brain with highlighted precentral gyrus, computer illustration. It is located in the posterior frontal lobe and is the site of the primary motor cortex, the Brodmann area 4.
    Human brain with highlighted middle frontal gyrus, computer illustration. It is part of the prefrontal cortex of the frontal lobe. It is involved in language, learning and attention. — Stock Photo
    Human brain with highlighted middle frontal gyrus, computer illustration. It is part of the prefrontal cortex of the frontal lobe. It is involved in language, learning and attention.
    Striated muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through striated skeletal muscle. The striated banding-pattern of the muscle fibrils is seen — Stock Photo
    Striated muscle. Coloured transmission electron micrograph (TEM) of a longitudinal section through striated skeletal muscle. The striated banding-pattern of the muscle fibrils is seen
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( blue) is an insulating fatty layer that surrounds the myelinated nerve fibres (pink) — Stock Photo
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( blue) is an insulating fatty layer that surrounds the myelinated nerve fibres (pink)
    Human brain with highlighted inferior frontal gyrus, computer illustration. It is a part of the prefrontal cortex and the location of Broca's area, which is involved in language processing and speech production. — Stock Photo
    Human brain with highlighted inferior frontal gyrus, computer illustration. It is a part of the prefrontal cortex and the location of Broca's area, which is involved in language processing and speech production.
    Cutibacterium (formerly Propionibacterium) bacteria, computer illustration. These are an example of non-pathogenic bacteria found on human skin, where they are well adapted to the natural acidity. An example is Cutibacterium acnes — Stock Photo
    Cutibacterium (formerly Propionibacterium) bacteria, computer illustration. These are an example of non-pathogenic bacteria found on human skin, where they are well adapted to the natural acidity. An example is Cutibacterium acnes
    Human brain with highlighted precentral and postcentral gyri, computer illustration. The sites of primary motor (precentral gyrus) and somatosensory (postcentral gyrus) cortex. — Stock Photo
    Human brain with highlighted precentral and postcentral gyri, computer illustration. The sites of primary motor (precentral gyrus) and somatosensory (postcentral gyrus) cortex.
    Human brain with highlighted supramarginal gyrus, computer illustration. It is involved in perception of language, limb location, identifying postures and gestures of other people. — Stock Photo
    Human brain with highlighted supramarginal gyrus, computer illustration. It is involved in perception of language, limb location, identifying postures and gestures of other people.
    Cutibacterium (formerly Propionibacterium) bacteria, computer illustration. These are an example of non-pathogenic bacteria found on human skin, where they are well adapted to the natural acidity. An example is Cutibacterium acnes — Stock Photo
    Cutibacterium (formerly Propionibacterium) bacteria, computer illustration. These are an example of non-pathogenic bacteria found on human skin, where they are well adapted to the natural acidity. An example is Cutibacterium acnes
    Illustration of the human brain with highlighted superior frontal gyri, also known as marginal gyri. It is located in the frontal lobe and is associated with self-awareness and laughter. — Stock Photo
    Illustration of the human brain with highlighted superior frontal gyri, also known as marginal gyri. It is located in the frontal lobe and is associated with self-awareness and laughter.
    Woman receiving grocery delivery from delivery man in mask — Stock Photo
    Woman receiving grocery delivery from delivery man in mask
    Woman receiving grocery delivery from courier in face mask at door — Stock Photo
    Woman receiving grocery delivery from courier in face mask at door
    Venule. Coloured transmission electron micrograph (TEM). Venules are small veins that transport deoxygenated blood from the capillary beds to the veins. Endothelial cells line the entire circulatory system — Stock Photo
    Venule. Coloured transmission electron micrograph (TEM). Venules are small veins that transport deoxygenated blood from the capillary beds to the veins. Endothelial cells line the entire circulatory system
    Amygdala of the brain, illustration. The amygdala (red) is part of the brain's limbic system and plays a key role in processing emotions. — Stock Photo
    Amygdala of the brain, illustration. The amygdala (red) is part of the brain's limbic system and plays a key role in processing emotions.
    Human brain with highlighted supramarginal gyrus, computer illustration. It is involved in perception of language, limb location, identifying postures and gestures of other people. — Stock Photo
    Human brain with highlighted supramarginal gyrus, computer illustration. It is involved in perception of language, limb location, identifying postures and gestures of other people.
    Human brain with highlighted corpus callosum, also known as callosal commissure, computer illustration. It is a wide, thick nerve tract connecting the left and right cerebral hemispheres. Front view. — Stock Photo
    Human brain with highlighted corpus callosum, also known as callosal commissure, computer illustration. It is a wide, thick nerve tract connecting the left and right cerebral hemispheres. Front view.
    Human brain with highlighted precentral and postcentral gyri, computer illustration. The sites of primary motor (precentral gyrus) and somatosensory (postcentral gyrus) cortex. — Stock Photo
    Human brain with highlighted precentral and postcentral gyri, computer illustration. The sites of primary motor (precentral gyrus) and somatosensory (postcentral gyrus) cortex.
    Human brain with highlighted supramarginal gyrus, computer illustration. It is involved in perception of language, limb location, identifying postures and gestures of other people. — Stock Photo
    Human brain with highlighted supramarginal gyrus, computer illustration. It is involved in perception of language, limb location, identifying postures and gestures of other people.
    Grateful woman receiving grocery delivery from courier at home — Stock Photo
    Grateful woman receiving grocery delivery from courier at home
    Lung bronchiole. Light micrograph of a section through lung tissue and a bronchiole. Bronchi form branches from the trachea and gradually diminish in diameter with increasing branching into bronchioles within the lung — Stock Photo
    Lung bronchiole. Light micrograph of a section through lung tissue and a bronchiole. Bronchi form branches from the trachea and gradually diminish in diameter with increasing branching into bronchioles within the lung
    Human compact bone tissue, light micrograph. — Stock Photo
    Human compact bone tissue, light micrograph.
    Human brain with highlighted postcentral gyrus, computer illustration. It is located in the lateral parietal lobe and is responsible for the sense of touch. — Stock Photo
    Human brain with highlighted postcentral gyrus, computer illustration. It is located in the lateral parietal lobe and is responsible for the sense of touch.