Unit A Reproduction

4.1 CHECK YOUR Understanding
1. (a) Identify the parts of the sperm, labelled
A to D, in Figure 4.
11. Name the structures labelled A to D on Figure 5.
A
C
A
B
D
D
Figure 4
(b) How is a sperm cell designed for its
function?
2. What is the purpose of the numerous
mitochondria in the middle section of the sperm?
3. Which structure produces sperm?
4. (a) How many sperm are produced in a
single day?
(b) What happens to sperm cells that are
not used?
5. What are the two functions of the testes?
6. Name the structure that stores sperm.
7. (a) Name the structures of the male
reproductive system that sperm do not
travel through.
(b) What is the name given to these structures?
8. Describe the composition and importance
of semen.
9. What two functions does the penis have?
10. Name the other body system that the penis is
part of.
B
C
Figure 5
12. (a) Describe the secondary sexual characteristics
of males.
(b) Why are these characteristics called
secondary?
(c) What event is responsible for causing them?
(d) What purpose do you think they serve?
(Hint: Think about the early humans.)
13. Which parts of the male reproductive system
are outside the body? Why do you think they
are outside the body?
14. Propose an explanation for why males have
two testes?
15. Using a flow chart, trace the path of the sperm
from its formation in a male until it dies or
fertilizes an egg in a female. Label all the structures.
Include accessory organs and their functions.
16. What are the differences between an immature
sperm cell and a mature sperm cell?
NEL
4.1 The Male Reproductive System 111