Q1 of 63 Page 162

Rewrite any two of the wrong statements by correcting only one word either at the beginning or at the end of the sentence.

The corrected statements are:


(i) Fertilisation occurs in the fallopian tube.


(ii) Gestation period in humans is about 280


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5

Match the items in column I with those in column II and write down the matching pairs (some may not match)



































Column I



Column II



(a) Acrosome



(i) An embryo which looks like human baby



(b) Gestation



(ii) Luteinizing hormone



(c) Menopause



(iii) Ovum producing cells



(d) Foetus



(iv) Semen



(e) Oogenesis



(v) Spermatozoa



(f) Ovulation



(vi) Complete stoppage of menstrual cycle




(vii) Time taken by a fertilized egg till the delivery of baby.


 1

State whether the following statements are TRUE (T) or FALSE (F):

(i) Fertilisation occurs in the vagina. (T/F)


(ii) The uterus is also known as the birth canal. (T/F)


(iii) Nutrition and oxygen diffuse from the mother’s blood into the foetus’s blood through amnion. (T/F)


(iv) Gestation period in humans is about 380. (T/F)

 2

Complete the following table by writing the name of the structure or the function of the given structure:































Structure



Function



1. Corpus luteum



1. _________



2. _________



2. Produces male gametes in mas.



3. Placental disc



3. ______________



4. _________



4. Increases the force of uterine contraction



5. Umbilical cord.



5. ____________



6. Fallopian tube



6. ________________


 3

Given below are the names of certain stages/substances related to reproduction and found in human body. Answer the questions related to them,

(a) Foetus.


● Where is it contained?


● How does it differ from an embryo?


(b) Hyaluronidase.


● Is it an enzyme or simply a protein?


● What is its function?


(c) Morula.


● What is this stage?


● Name the stage which comes next to it?


(d) Amniotic fluid.


● Where is it found?


● What are its functions?


(e) Gestation.


● What is its meaning?


● How long does it normally last?


(f) placenta.


● What are the two sources that form placenta? Name any two main substances which pass from foetus to mother through the placenta.


● Name any two main substances which pass from fetus to mother through the placenta.


● Name any two hormones it produces.


(g) Implantation.


● The development stage that undergoes this process.


●The approximate time after fertilization, when it occurs.