Urinary system: set of organs producing urine in human beings, comprised chiefly of the kidneys, ureters, bladder and urethra. See more
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Respiratory apparatus: set of organs of respiration. See more
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Arterial system: canals that carry blood from the heart to the organs. See more
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Blood vessels: organic conduits carrying blood to the heart and organs. See more
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Heart: four-chambered, egg-shaped muscular organ. The central apparatus of blood circulation. See more
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Sperm: male gamete composed of a head and a flagellum. See more
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Cleavage of a sygote: cell resulting from fertilization. In dividing, the egg becomes a new being. See more
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Pregnancy: implantation of a fertilized egg in the uterus. See more
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Notable colección de dibujos (más de 7100) pertenecientes a la Real Expedición Botánica al Nuevo Reino de Granada (1783-1817) que fue liderada por el gaditano José C ...