(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.