Advertisements
Advertisements
Question
State the role of placenta in the development of embryo.
Solution
The placenta provides nourishment to the developing embryo. Glucose and oxygen are passed from the mother to the embryo through it. Wastes generated in embryo are also removed into mother’s blood by placenta.
APPEARS IN
RELATED QUESTIONS
Do all organisms give birth to individuals like humans?
Which part of the human body produces sperms?
Write the names of male sex hormone?
Describe the process of fertilisation in humans and development of embryo briefly.
One of the following is not a part of the human male reproductive system. This is
(a) testis
(b) oviduct
(c) seminal vesicle
(d) prostrate gland
When a female child is born, her ovaries already contain thousands of immature eggs (or ova) contained in immature structures A. On maturing, A bursts open and an egg shoots out of the ovary in a process called B. The process B starts in the females at puberty and occurs again and again after a time period x. Before every occurrence of process B, the inner lining of uterus becomes thick and soft with lots of blood vessels in it. When the egg cell gets fertilised by a sperm, then an event C occurs in the life of mature human female which lasts for time period y leading to the birth of baby. If, however, the egg cell released by the ovary does not get a sperm to fuse with, then the thick and soft inner lining of uterus breaks down and comes out of the female's body in an event called D. The occurrence of event D is controlled by chemical substances E.
(a) What are A?
(b) What is process B?
(c) What is the time period x?
(d) Name the event C.
(e) How much is the time period y?
(f) What is the name of process D?
(g) Name the chemical substances E.
Give the name:
Methods of family planning.
Name the following:
Organ where implantation takes place.
Name the Following
What does this abbreviation stand for FSH?
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Women after the age of 45 years normally cannot produce children.