(3)
2. (a) Name the parts labelled A, B, C, D and E.
B
С
D
E
(b) Where do the following functions occur?
(1) Production of an egg
(ii) Fertilisation
(iii) Implantation of zygote.
(c) What happens to the lining of uterus:
(1) before release of a fertilised egg?
(ii) if no fertilisation occurs?
baina
(2)
Answers
Explanation:
1)Ovary
ii)A pregnancy starts with fertilization, when a woman's egg joins with a man's sperm. Fertilization usually takes place in a fallopian tube that links an ovary to the uterus. If the fertilized egg successfully travels down the fallopian tube and implants in the uterus, an embryo starts growing.
iii)During fertilization, the sperm and egg unite in one of the fallopian tubes to form a zygote. Then the zygote travels down the fallopian tube, where it becomes a morula. Once it reaches the uterus, the morula becomes a blastocyst. The blastocyst then burrows into the uterine lining — a process called implantation.
c) 1)Before release of egg the uterus prepares itself to receive the egg and makes a thick and soft lining of blood capillaries. It the egg does not get fertilized then after 28 days the lining breaks down and comes out through vagina in the form of blood.
2)If no sperm is around to fertilize the egg, it moves through the uterus and disintegrates. Your hormone levels go back to normal. Your body sheds the thick lining of the uterus, and your period starts.
