Study the diagram given below and then answer the questions that follow:
i) Name the part labelled A. Name any two hormones produced by the part labelled A.
ii) What happens to the part labelled B:
1) Of fertilisation takes place?
2) If fertilisation does not take place?
iii) Where does fertilisation occur?
iv) Draw a neat diagram of the human sperm as seen under high magnification and label the following parts.
1. Acrosome
2. Mitochondria.

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Solution

a. i) A - Ovary
Two hormones secreted by ovary are
1) Oestrogen
2) Progesterone
ii) 1) If fertilisation takes place, part B ie. uterus gets prepared to receive the embryo, the endometrial lining thickens and gets highly vascularised.
2) If fertilisation does not take place part B, then the endometrial lining of uterus erodes causing bleeding, i.e. menstruation.
iii) Fertilisation occurs in the fallopian tube/oviduct.
iv) Human sperm

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