Repro Quiz 2 Flashcards
Male Repro system is a __ step manufacturing process
5
Male Repro system products
Fertile spermatozoa
Male Repro system efficiency depends upon
Hormones and secretory products
3 sections of epididymis
Caput (head), corpus (body), cauda (tail)
Provides the environment for final maturation of spermatozoa and serves as a storage organ for these cells
Epididymis
Warehouse and shipping center
Storage of fertile spermatozoa before ejaculation
Smooth muscle contractions
Tail of epididymis
Final alterations and packaging
Secretes substances into pelvic urethra
Accessory sex glands
Fluid from tail of epididymis and accessory sex glands
Liquid, non-cellular portion of semen
Seminal plasma
Manufacturing and assembly
Primary reproductive organs
Testes
Finishing shops
Fluid absorption
Motility
Head and body of epididymis
Sperm undergo changes to become fertile
Capacitation
6 basic components of the male reproductive system
Spermatic cord, scrotum, testis, excurrent duct system, accessory sex glands, penis and muscles
Excurrent duct system
Efferent ducts, epididymis, ductus deferens
Suspends testis in scrotum
Extends from inguinal ring to dorsal pole of testis
Spermatic cord
Spermatic cord is the most highly developed in ____ and _____. (Pendulous scrotum)
Rams and bulls
4 components housed by spermatic cord
Testicular vasculature, lymphatics, and nerves
Ductus deferens
Cremaster muscle
Pampiniform plexus
Connect to body
Testicular vasculature, lymphatics and nerves
Sperm transport
Ductus deferens
Supports testes
Aids in testicular temperature control
Follows length of spermatic cord
Striated muscle
Cremaster muscle
Heat exchanger - specialized vascular network
Temperature control of testis
Important for successful manufacture of spermatozoa
Pampiniform plexus
Spermatic artery and spermatic vein
In body and dorsal portion of spermatic cord
Uncoiled
Spermatic artery and spermatic vein
Ventral portion of spermatic cord - close to testis
Coiled
Warm blood of body (spermatic artery) -> cooler blood leaving surface of testis (spermatic vein)
Heat transfer
Blood entering testis is “pulseless”
Pulse pressure eliminator
Animals without a scrotum - tested remain internalized
Birds, elephants, sloths, armadillos, whales, dolphins
Mammals that have testis inside and outside of the body cavity
Rats, rabbits
Temperature regulation less important in the _______ position
Retroperitoneal
2-lobed sack
Acts as a thermosensor, radiator, and protective sac
Scrotum
4 layers of scrotum
Skin, tunica dartos, scrotal fascia, parietal tunica vaginalis
Many sweat glands which are innervated with sympathetic nerves
Skin
Increased body or scrotal temperature =
Hypothalamus triggers sweat glands
Cool scrotum and testes by evaporative heat transfer
Sweat glands
Many thermosensitive nerves
Highly developed neural pathway between scrotum and respiratory center in brain
Scrotal skin
Mesh-like smooth muscle layer beneath scrotal skin
Degree of contraction dependent on scrotal skin temperature
Smooth muscle
Tunica dartos
Testes produce 3 things
Spermatozoa, hormones and proteins, fluids
4 components of testis
Testicular capsule, parenchyma, mediastinum, rete tubules
2-layered covering of testis
Testicular capsule
Testicular capsule layers
Visceral tunica vaginalis and tunica albuginea
Connective tissue capsule
Sends finger-like projections into mediastinum
Tunica albuginea
Cellular mass of a gland or organ that is supported by a network of connective tissue
Parenchyma
Components of testicular parenchyma
Seminiferous tubules, leydig cells, capillaries, lymphatic vessels, connective tissue
Tubular compartment consists of ______ ______
Seminiferous tubules
Microscopic-form highly convoluted loops
Ends join with rete tubules
Spermatogenesis
Seminiferous tubules
Components of tubular compartment
Seminiferous epithelium, Sertoli cells, developing germ cells, peritubular cells
Basal and adluminal compartment
Seminiferous epithelium
Secrete fluid for sperm transport
Cellular “governors” of spermatogenesis
Sertoli cells
Speematogonia primary and secondary spermatocytes spermatids
Developing germ cells
Contractile for sperm transport
Peritubular cells
Many Sertoli cells =
Many sperm
Seminiferous epithelium cells
Only somatic cells
Sertoli cells secrete
Androgen binding protein, sulfated glycoproteins, tranferrin, inhibin
Testosterone transport
Androgen binding protein