Every human being begins life a a single cell, formed when father’s sperm fertilises mother’s egg. Fertilisation normally takes place in the mother’s Fallopian tube, which connects the uterus ( womb ) with the ovary. The uterus is the size and shape of a large pear: it is made of muscle and it streches to allow the baby’s growth throughout the months of pregnancy.
A woman ardinarily has two tubes and two ovaries, one at each side of her uterus. Every month one of the ovaries in turn releases an egg ( ovurn ) which passes slowly along the tube towards the womb cavity if the egg is not fertilised within 12 hours of being released, it dies; it cannot develop further. But if the woman has sexual intercourse during the days of her monthly cycle just before or at the time when an egg has been released from the ovary, then many sperm cells released by her partner may travel up to the Fallopian tube and one may fertilise the egg. When fertilisation is complete and the nuclei of egg and sperm have combined, a new being comes into existence and is capable of further development.. Because the parents are human belonging to the species Homo sapiens- the new being is also human. Fertilisation ( by which we mean conception ) marks the beginning of the human lifespan.
No comments:
Post a Comment
Silahkan anda berkomentar, namun tetap jaga kesopanan dengan tidak melakukan komentar spam.