(a) Enumerate three major organs in each of the thoracic and abdominal cavities of farm animals (b) State two functions of the nervous and one function of the reproductive systems (c) Explain the importance of the following systems in farm animals: (i) circulatory system (ii) respiratory system (iii) digestive system.
Explanation
(a)(i) Major organs in the thoracic cavity: lungs, trachea (ii) Major organs in the abdominal cavity: liver, establish (or sow), uterus, stomach, oviduct/fallopian tube, kidney,.Ovary, spleen, intestine, gall bladder, pancreas
(b)(i) Functions of the nervous system: (1) coordinates body functions (2) responsible for bringing about locomotion/ movement (3) enables the body to respond to external stimuli.
(ii) Function of the reproductive system: (1) ensures the continuity of species by gamete formation and coitus/ mating/ servicing (2) formation of eggs and spermatozoa (sperm cells) (3) ensures production of reproductive hormones
(c) Importance of (i) Circulatory system: (1 ) circulates nutrients to body tissues (2) removes waste products from body tissues (3) assists in heat distribution in the body (4) assists in distributing Oxygen (O2) and removal of Carbon (iv) Oxide (CO2) from tissues (5) contains white blood cells which helps in combating diseases (6) helps in turgidity (7) ensures blood circulation in the body (7) transports hormones & Enzymes within the body.
(ii) Respiratory system: (1 ) supplies Oxygen (O2) to the body cells (2) can help reduce heat load in the body especially in poultry (3) removes Carbon (iv) Oxide (CO2) from the body. (4) Gaseous exchange .
(iii) Digestive system: (1) ingestion of feed (2) digestion of feed (3) absorption of digested feed (4) helps in ejection of undigested feed. (5) secretion of productive hormones and digestive enzymes .
