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Question
Differentiate between:
Amnion and allantois
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Solution
Amnion is a sac which develops around the embryo whereas allantois is an extension from the embryo which forms villi of placenta.
RELATED QUESTIONS
Given below are the names of certain stages/substances related to reproduction and found in human body. Answer the questions related to them.
Gestation
• What is its meaning?
• How long does it normally last?
Given below is the name of certain stage/substance related to reproduction and found in human body. Answer the questions related to it.
Implantation.
- The development stage that undergoes this process.
- The approximate time after fertilisation, when it occurs.
The diagram given below is that of a developing human foetus in the womb. Study the same and then answer the questions that follow:
- Name the parts '1' to '5' indicated by guidelines.
- What term is given to the period of development of the foetus in the womb?
- How many days does the foetus take to be fully developed?
- Mention two functions of the parts labelled ‘2’ other than its endocrine function.
- Name the hormone (anyone) produced by the part labelled ‘2’.
- What is the function of the part marked ‘3’?
Complete the following sentences with appropriate word:
The embryo inside the uterus is protected from jerks or mechanical shocks by ________
Which of the following reproductive structures is responsible for secretion of hCG?
Mention any two functions of the human foetal placenta.
Assertion (A): The foetus respires but does not breathe.
Reason (R): The maternal blood supplies oxygen to the foetus through placenta.
Name the following:
Two hormones secreted from placenta.
List the substances which the foetus receives from the mother through placenta.
Which of the following cannot pass readily through the placenta to the foetus?
