Heart: four-chambered, egg-shaped muscular organ. The central apparatus of blood circulation. See more
Heart - Visual Dictionary - Copyright © 2005-2016 - All rights reserved.
Sperm: male gamete composed of a head and a flagellum. See more
Sperm - Visual Dictionary - Copyright © 2005-2016 - All rights reserved.
Cleavage of a sygote: cell resulting from fertilization. In dividing, the egg becomes a new being. See more
Cleavage of a sygote - Visual Dictionary - Copyright © 2005-2016 - All rights reserved.
Pregnancy: implantation of a fertilized egg in the uterus. See more
Pregnancy - Visual Dictionary - Copyright © 2005-2016 - All rights reserved.
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