Male Repro

Produces sperm and testosterone (secondary male characteristics)

Passageway of sperm from testes to vas defernes

Sperm not capable of fertilization or motility

Sperm gain motility

Transport sperm from testes to penis

Secrete components of seminal fluid

Fibroelastic (Most farm animals) or vascular type (stallion)

*Produce and maintain supply of sperm *Detect females in estrus *Inseminate females and fertilize the female gamete

*fertility * how many? * body condition

contains vas defers, pan-uniform plexus, and external cremaster muscle nerves (raise muscle)

Connective tissue which holds testis together (white covering on ovary or teste)

Sperm producing cells (true germinal epithelium)

Function in sperm transport from seminiferous tubules (100)

Function in maturation of spermatozoa fluid absorption

Maturation of spermatozoa

Final maturation and storage, only sperm capable of fertilization

Horses

• boar, bull, ram • fibrous, hard sheath of connective tissue all the way through penis • penis does not expand in diameter (rigid and extends)

• Stallion & humans • penis increases in diameter and length when aroused • “bells out” to plug cervix of female during ejaculation

Flehmen Response (exposure of nasoplatine duct to absorb pheromones)

• lack of tests resent into scrotum and thus thermoregulation is absent (Horses)

• sterile • no spermatogenesis • testosterone is produced

• fertile *reduced sperm producing capacity

(common in boars and stallions)