(a) Name four parts of the reproductive system of each of the following farm animals: (i) bull; (ii) hen.
(b) Give one function of each of the parts named in 3(a).
(c) Describe the process of cassava tuber in the mouth of a pig.
Explanation
(a) Parts of the reproductive system of:
(i) bull
- seminal vesicle
- testis
- spermatic cord
- scrotum
- urethra
- penis
- epididymis
- vas deferens
- cowper's gland
- prostate gland
(ii) Hen
- Ovary/oval/ovum
- shell gland/uterus
- Funnel/ infundibulum/Fallopian tube Vagina Sphincter
- magnum/ampulla
- Vagina
-isthmus
- Sphincter
- Cloaca
(b) Functions of parts named
Bull
Testis: sperm production, secretion of hormones
Scrotum: covers the testis and regulates the temperature of the testis
Urethra: passage for semen /sperm
Penis: copulatory organ, discharge and deposition of semen into reproductive organ of female.
Epididymis: transportation, concentration and storage of semen
Vas deferens: passage for sperm/semen into urethra
Seminal ‘Vesicle: produces a sugar rich fluid (fructose) for energy
Spermatic cord: supplies blood, nutrient and oxygen
Cowper's gland: secretes fluid that lubricates the urethra and neutralises acidity caused by the residual drops of urine.
Prostate gland: increases the volume of the ejaculate; helps to nourish the sperm: promotes movement of spermatozoon
Hen
Ovary: Production of ova, secretion of hormones
Funnel: Passage of ova into magnum; fertilisation of ova
Magnum: Secretion of albumen, formation of chalaza
Shell gland/uterus: Formation and deposition of shell, adds water to swell up the egg. Deposits minerals
Vagina: Copulatory organ, temporary storage of egg
Sphincter: Contracts to hold egg in vagina or relaxes to release egg into cloaca
Cloaca: Opening for laying egg
Isthmus: Secretes shell membrane, determines shape or the egg.
(C) Process of digestion of cassava tuber in the mouth of a pig
- Tuber is chewed: ground with teeth/ masticated to reduce size.
- Saliva is secreted by salivary gland.
- Food is mixed with saliva to make it soft/moist/ lubricated.
- Amylase from saliva acts to break down starch to maltose.
- Food is rolled in IT the tongue and pushed back and swallowed.