Was kann ich tun?
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.
Urinary system: set of organs producing urine in human beings, comprised chiefly of the kidneys, ureters, bladder and urethra. See more
Urinary system - Visual Dictionary - Copyright © 2005-2016 - ...