(a) Write the function of following parts in human female reproductive system:
i. Ovary
ii. Oviduct
iii. Uterus
(b) Describe in brief the structure and function of placenta.
Answers
Answer:
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Explanation:
(a) i. Ovary :- It produces egg (ovum). It also produces the hormones; oestrogen and progesterone.
ii. Oviduct :- It is the site of fertilization. It carries egg (ovum) or fertilized ovum (zygote) to the uterus.
iii. Uterus :- It is the site of development of embryo. It protects and nourishes the embryo.
(b) Placenta- It is a disc embedded in uterine wall which contains villi on the embryo side of the tissue and blood space on mother side.
Function of placenta: It provides nourishment to embryo from mother’s blood and also facilitates removal of waste from embryo to mother’s blood.
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Answer:
- Ovary - It releases ova or egg.
- Oviduct - The oviduct carries the ova to the uterus.
- Uterus - For the implantation of the zygote.
Placenta is a collective set of special tissues which is composed of maternal and fetal segment.
It is a temporary part in the uterus of the mother, which is delivered out of the body when baby is born.
Structure:
-Placenta is in the shape of a flat disc.
-It is developed from parts called as chorion and allantois.
-It is found attached to the wall of uterus and connected to the fetus via umbilical cord.
-It has tree like branches called villi and are connected at the point called cotyledons on mother's organ.
Functions:
-Primary role is to feed the fetus. It transmits the nutrition from mother's blood to the embryo.
-Excretion of unwanted stuff is carried out.
-It also acts as a protective membrane and provides immunity.