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Photographer: FRANCIS LEROY

See all images by FRANCIS LEROY
Artwork illustrating the compact internal structure of a human hepatocyte

Most recent FRANCIS LEROY images

Here are the latest images from FRANCIS LEROY. This page is updated automatically each time new images are added. To view more details for an image, click on the thumbnail.

  • Illustration of the capillary blood supply of a follicle in the human thyroid gland. The thyroid endocrine gland consists of many closed spheroidal follicles, of which one is cut through and dis- played here (blue). Cuboidal epithelial cells, which s
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    • Illustration of the capillary blood supply of a follicle in the human thyroid gland. The thyroid endocrine gland consists of many closed spheroidal follicles, of which one is cut through and dis- played here (blue). Cuboidal epithelial cells, which s
  • Illustration of a section through human skin, showing the location of a Meissner's corpuscle (centre right), an encapsulated nerve ending that transduces touch stimuli into electrical impulses. Meissner's corpuscles are found in upper dermis: this on
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    • Illustration of a section through human skin, showing the location of a Meissner's corpuscle (centre right), an encapsulated nerve ending that transduces touch stimuli into electrical impulses. Meissner's corpuscles are found in upper dermis: this on
  • Illustration of a human sperm fertilising an egg. The picture shows the size difference between the egg, or ovum, & the spermatozoon. Human spermatozoa are extremely elongated single cells about 65 micrometres long, divided into 3 main regions: a hea
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    • Illustration of a human sperm fertilising an egg. The picture shows the size difference between the egg, or ovum, & the spermatozoon. Human spermatozoa are extremely elongated single cells about 65 micrometres long, divided into 3 main regions: a hea
  • Illustration of a human sperm fertilising an egg. The picture shows the size difference between the egg, or ovum, & the spermatozoon. Human spermatozoa are extremely elongated single cells about 65 micrometres long, divided into 3 main regions: a hea
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    • Illustration of a human sperm fertilising an egg. The picture shows the size difference between the egg, or ovum, & the spermatozoon. Human spermatozoa are extremely elongated single cells about 65 micrometres long, divided into 3 main regions: a hea
  • Illustration based on a scanning electron micrograph of a human ovum, or egg, surrounded by numerous spermatozoa. In fertilisation, only a single sperm may successfully penetrate the ovum to fuse with the female nucleus. Barriers to be overcome inclu
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    • Illustration based on a scanning electron micrograph of a human ovum, or egg, surrounded by numerous spermatozoa. In fertilisation, only a single sperm may successfully penetrate the ovum to fuse with the female nucleus. Barriers to be overcome inclu
  • Artwork illustrating the process of mammalian fertilisation, showing penetration of an ovum or egg by a single spermatozoon. The sperm has successfully penetrated the layers of follicular cells, the corona radiata, which envelop the egg & broken thro
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    • Artwork illustrating the process of mammalian fertilisation, showing penetration of an ovum or egg by a single spermatozoon. The sperm has successfully penetrated the layers of follicular cells, the corona radiata, which envelop the egg & broken thro
  • Artwork describing the organs of the female reproductive system. In centre is the pear-shaped uterus (womb) which opens into the vagina (bottom) through the cervix. The ovaries, containing ovarian follicles (in red) are at left and right and connect
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    • Artwork describing the organs of the female reproductive system. In centre is the pear-shaped uterus (womb) which opens into the vagina (bottom) through the cervix. The ovaries, containing ovarian follicles (in red) are at left and right and connect
  • Illustration of a nephron, the functional unit of excretion in the human kidney. As a blood filtering system, a nephron is richly supplied with capillaries from branches of the renal artery (red) and vein (blue). At centre right, a knot of capillarie
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    • Illustration of a nephron, the functional unit of excretion in the human kidney. As a blood filtering system, a nephron is richly supplied with capillaries from branches of the renal artery (red) and vein (blue). At centre right, a knot of capillarie
  • Artwork of the internal structure of the heart. On the left, the right atrium (top cavity) & right ventriculum (bottom) receive deoxygenated blood from the body through the superior & inferior vena cava, coloured blue. From the right ventriculum the
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    • Artwork of the internal structure of the heart. On the left, the right atrium (top cavity) & right ventriculum (bottom) receive deoxygenated blood from the body through the superior & inferior vena cava, coloured blue. From the right ventriculum the
  • Illustration showing the role of an oligodendrocyte in the myelination of nerve fibres (axons) in the central nervous system (CNS - the brain & spinal cord). Oligodendrocytes belong to a group of cells called neuroglia ('nerve glue') which comprise a
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    • Illustration showing the role of an oligodendrocyte in the myelination of nerve fibres (axons) in the central nervous system (CNS - the brain & spinal cord). Oligodendrocytes belong to a group of cells called neuroglia ('nerve glue') which comprise a
  • Artwork based on a resin cast of the numerous blood vessels servicing the human brain.
  • Artwork of an external, profile view of a whole human brain, showing the spinal cord at bottom. The appearance of the human brain is dominated by the heavily-folded exterior of the cerebral cortex (the grey matter). The cerebral cortex is involved in
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    • Artwork of an external, profile view of a whole human brain, showing the spinal cord at bottom. The appearance of the human brain is dominated by the heavily-folded exterior of the cerebral cortex (the grey matter). The cerebral cortex is involved in
  • Computer graphic representation of the haemoglobin molecule, the oxygen-carrying substance of human blood. The roughly tubular features (in orange and blue) are polypeptide (protein) chains, of which there are four in two identical pairs. The protein
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    • Computer graphic representation of the haemoglobin molecule, the oxygen-carrying substance of human blood. The roughly tubular features (in orange and blue) are polypeptide (protein) chains, of which there are four in two identical pairs. The protein
  • Blood cells. Artwork (based on a scanning electron micrograph) showing various blood cells escaping from a sectioned small vein (top right). Red blood cells (erythrocytes) appear as biconcave discs; the knobbly red cells have become crenated (this oc
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    • Blood cells. Artwork (based on a scanning electron micrograph) showing various blood cells escaping from a sectioned small vein (top right). Red blood cells (erythrocytes) appear as biconcave discs; the knobbly red cells have become crenated (this oc
  • Illustration of a model for the potassium and sodium ion channels through pores in the plasma membrane of an animal nerve cell: an example of active transport, where solutes (ions, sugars, amino acids) are pumped into cells from a region of lower to
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    • Illustration of a model for the potassium and sodium ion channels through pores in the plasma membrane of an animal nerve cell: an example of active transport, where solutes (ions, sugars, amino acids) are pumped into cells from a region of lower to
  • Artwork illustrating the compact internal structure of a human hepatocyte
  • Artwork illustrating a mechanism for replication of DNA
  • Illustration based on a scanning electron micrograph (SEM) of numerous multipolar neurones (nerve cells) growing in tissue culture.
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    • Illustration based on a scanning electron micrograph (SEM) of numerous multipolar neurones (nerve cells) growing in tissue culture.
  • Artwork of a nerve cell (neurone) and its associated structures
  • Cutaway illustration of the internal structure of a typical bacterial cell
  • Artwork based on a scanning electron micrograph (SEM) of a microcapillary network
  • Artwork based on a scanning electron micrograph (SEM), showing a large cancer cell surrounded by three cytotoxic T-lymphocytes (white blood cells).
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    • Artwork based on a scanning electron micrograph (SEM), showing a large cancer cell surrounded by three cytotoxic T-lymphocytes (white blood cells).
  • Illustration based on a scanning electron micrograph of a sectioned human lymph node
  • H5N1 avian flu virus
  • E. Coli bacteria

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