Q2 of 63 Page 162

The diagram given alongside is that of a developing human foetus in the womb. Study the same and answer the questions that follow:


(a) Name the parts ‘1’ to ‘5’ indicated by guidelines.


(b) What term is given to the period of development of the foetus in the womb?


(c) How many days does the foetus take to be fully developed?


(d) Mention two functions of the parts labeled ‘2’ other than its endocrine function.


(e) Name any one hormone produced by the part labeled ‘2’.

(a) 1. umbilical cord,


 


2. placenta,


 


3. amnion,


 


4. the mouth of the uterus,


 


5. the muscular wall of the uterus


 


(b) Gestation


 


(c) 280 days.


 


(d) Placenta provides the foetus with oxygen and nutrients. In addition, the placenta also removes carbon dioxide and waste products of the foetus.


 


(e) Progesterone


 

More from this chapter

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3

Describe the functions of

(a) amnion


(b) placenta

 1

The diagram below represents two reproductive cells A and B. Study the same and then answer the questions that follow:


(a) Identify the reproductive cells A and B.


(b) Name the specific part of the reproductive system where the above cells are produced.


(c) Where in the female reproductive system do these cells unite?


(d) Name the main hormones secreted by the


(e) Name an accessory gland found in the male reproductive system and state the function of its secretion.

 3

Given below is a portion of the diagram to show the diagrammatic highly magnified view of a single human sperm. Complete the diagram to show its normal structure.

 4

The figure given alongside represents the female reproductive system of a mammal.


(a) Name the parts labeled A – D.


(b) What will happen if the part B on both sides gets blocked?