The Anatomy and Physiology of Animals/Reproductive System Worksheet/Worksheet Answers

1. Add the labels to the diagram of the reproductive system of a male dog shown below.



2. Fill in the table using the choices in the list below.

3. The diagram below shows a section through a testis.

Colour and label the structures of the diagram.


 * 1.	Seminiferous tubules in which the sperm are made. Blue
 * 2.	Collecting ducts where the sperm are stored. Green
 * 3.	Epididymis in which sperm mature and become motile. Red
 * 4.	Fibrous coat surrounding and protecting the testis.  Brown
 * 5.	Vas deferens or sperm duct.  Yellow



4. The diagram below shows a sperm. Colour and label the following areas.
 * a) 	The DNA-containing area. Brown
 * b) 	The enzyme-containing sac that aids sperm penetration of the egg. Yellow
 * c) 	 The midpiece - contains mitochondria for energy for sperm movement. Red
 * d) 	 The tail – propels the sperm along the female tract.  Blue



5. a) What is the difference between sperm and semen?


 * Sperm are the gametes that carry the genetic material (head, midpiece and tail) while semen is the fluid produced by the accessory glands plus the sperm carried in it.


 * b) 	What is the difference between infertility and impotence?
 * Infertility is the inability to conceive and have offspring while impotence is the inability to mate.

6. Add labels to the diagram of the female reproductive system below.



7. Fill in the following table with the words from the list below. Some words may need to be used more than once.

8. The diagram below shows an ovary with the stages of development of the ovum during an ovarian cycle. i) Chose different colours and colour in:
 * a) The cells that produce oestrogen. Red
 * b) The structure that produces progesterone. Yellow
 * c) All the ova. blue

ii) 	In the space provided, name the event shown as “event A’ on the diagram.



9. a)	Arrange the following events in the ovarian cycle in the correct order in which they occur.  Put the numbers in the correct order in the boxes below.

10 	The diagrams below show different stages in the ovarian cycle.


 * i.	In the spaces under the diagrams write a few words describing what is happening in diagram above.


 * ii.	Now show by means of arrows added to the diagram, where the hormones FSH (follicle stimulating hormone), LH (luteinising hormone), oestrogen and progesterone act or are produced.



11. State whether the following statements are true or false. If false write in the correct answer.


 * 1. 	The mixing of foetal and maternal blood in the placenta allows easy transfer of nutrients and oxygen to the foetus.
 * ''F. Although the foetal and maternal blood flow close to each other they do not mix in a healthy placenta.
 * 2. 	Adrenaline cannot easily cross the placenta. T
 * 3. 	Antibodies cannot pass across the placenta from the mother.
 * F. Antibodies from the mother do cross the placenta to the foetus.
 * 4. 	Colostrum contains lots of hormones.
 * F Colostrum contains antibodies but not hormones.
 * 5. 	Oestrogen stimulates milk “let-down”.
 * F Oxytocin from the posterior pituitary gland is the hormone that stimulates milk "let-down"
 * 6. 	Young animals often have to be given iron supplements because milk contains very little iron. T

12. Insert the correct term into the table.