ANSC 1401 TTU Final, Animal Science 1401 Final Exam Rated A+

ANSC 1401 TTU Final, Animal Science 1401 Final Exam Rated A+ Reproductive Efficiency The number of live offspring born in a given period 5 factors influencing reproductive efficiency Physiology of animal Genetic Potential Nutrition Season of year Other environment factors How does reproductive efficiency affect maintenance? more offspring means less cost/unit How does reproductive efficiency affect selection? more offspring means more genetic improvement Species differences management, environment, and goals vary by species Primary sex organ of the male Testis Within the testicle, sperm are produced by the seminiferous tubules Gamete (sperm) function Within the testicle, testosterone is produced by the interstitial cells Endocrine function Long tube attached to the side of the testicle that functions as an area for sperm maturation and storage Epididymis A tube that transports sperm from the epididymis to the urethra. vas deferens Reservoir where the vas deferens joins the urethra in animals that ejaculate rapidly. Temporary storage for sperm. ampulla Do boars and dogs have ampulla? No Rapid ejaculators Bull, stallion, ram, buck Its secretions nourish and stimulate activity of sperm. Opens into urethra close to opening of bladder Prostate gland Neutralize urine residues and stimulate activity of sperm. Opens into urethra Vesicular glands (seminal vesicles) Neutralize urine residues, add volume to ejaculate, and opens into urethra Bulbourethral glands (cowpers glands) What do the cowper glands do in boar semen? Form gel that plugs sow cervix Are seminal vesicles large in boars? Yes Large muscular canal from bladder through penis. Passageway for sperm and urine Urethra Organ of copulation and passageway for urine/semen Penis Free end of the penis Glans penis Spongy tissue that fills with blood making penis erect Cavernosum tissue Two types of cavernosum tissue Fibroelastic, vascular Cavernosum tissue with sigmoid flexure fibroelastic Cavernosum tissue without sigmoid flexure