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VET 1250

Reproductive Systems

3 main functions of male reproductive system produce spermatazoa, produce androgens, deliver spermatazoa to female
contains the nucleus of the sperm, covered by acrosome containing digestive enzymes head
power plant with mitochondria midpiece
long, narrow, contractile fibrils produce movement tail
sperm are produced in the seminiferous tubules
sperm starts as a diploid _______ primary spermatocyte
sperm becomes a haploid ______ secondary spermatocyte
once sperm are fully developed they are stored in the, flat ribbonlike structure that lies along the surface of the testes, site of maturation of sperm epididymis
before birth the testes develop in the abdominal cavity
testes are housed in a sac of skin called the, helps regulate temperature of testes scrotum
at birth or soon after the testes are pulled through the inguinal ring
two main functions of testes spermatogenesis and hormone production
produce male sex hormones under influence of LH that are found in seminiferous tubules but they themselves are outside the st interstitial cells
fibrous connective tissue that protects and supports the soft content of the testes tunica albuginea
layers of tissue that surround and support the testes and spermatic cord parietal and visceral vaginal tunic
adjusts the position of the testes, cold pulls closer, hot relaxes cremaster muscle
contains blood vessels, nerves, lymphatic vessels, and the vas deferens spermatic cord
helps maintain the testes at temp lower than the body temp pampiniform plexis
muscular tube that connects the epididymis to the urethra, thick layers of smooth muscle, propels semen vas deferens
ejaculation is function of this urethra
produce alkaline fluid containing electrolytes, fructose, and prostoglandings accessory repro glands such as prostate, seminal vesicle, and bulbourethral gland
3 parts of penis with urethra running down center roots, body, glans
body of penis has two bundles of erectile tissue called corpus cavernosum urethrae/penis
the enlargement and stiffinging of the penis that prepares it for breeding is a _____; occurs when more blood enters via arteries and leaves via veins; hydraulic pressure parasympathetic reflex
sheath of skin that encloses penis; outer layer is normal, inner is mucous membrane prepuce
enlargement toward the rear of the glans in dogs bulb of the glans
in bulls, rams, and boars, teh penis does not enlarge but straightens due to this muscle retractor penis muscle
cells that provide nutritional support for sperm in seminiferous tubule sertoli cells
failure of testes to descend cryptorchidism
surgical removal of vas deferens vasectomy
is the immature cell that waits in the ovary for the signal to start developing Diploid Chromosome Number When activated the primary divides by Meiosis each having haploid chromosome number Primary oocyte
When activated the primary divides by Meiosis each having haploid chromosome number broad ligament
Cord of fibrous tissue and smooth muscle that extends from the tip of the uterine horn caudally and to the inguinal ring round ligament
Ligament-The ovarian end of the broad ligaments extends cranially and attaches to the area of the last rib suspensory ligament
Located dorsal part of the abdomen near the kidneys, produce ova, produce estrogen and progesterone ovaries
process by which ova are produced by follicles in the ovary oogenisis
produce one mature ovum per cycle uniparous
produce multiple mature ovum per cycle multiparous
Contains immature reproductive cell oocyte Surrounded by follicular cells Follicular Recruitment - FSH is released and only allows a few of primordial follicles to begin developing primary follicle
activated primordial cell, Follicular cells become thick and cubodial shape and begin to multiply surrounding the follicle become known as Granulosa cells As granulosa cells start to multiply the follicle starts to grow in size rapidly growing follicle
Once the follicle has reached its maximum size it looks and feels like a large blister on the ovary mature follicle (graafian)
Result as the rising level of LH Rupture of the mature follicle and release of ovum into the oviduct Time breeding should take place Empty follicle fills with blood and clots rapidly forming the Corpus Hemorrhagicum ovulation
Under continuous LH stimulation -Granulosa cells the line the blood filled follicle begin to multiply again forming a solid yellow structure formation of the CL
Produces progesterone which is necessary in maintaining pregnancy if the ovum has been fertilized corpus luteum
Small convoluted tubes that extend from the tips of the uterine horns Function- guide the ova from the ovary to the uterus and serve a usual site for fertilization fallopian tubes
funnel like opening that catch the ova from the ovary and surround the area of the ovary where follicles have formed infundibulum
fingerlike projections help position the infundibulum where follicles are located. fimbrae
site of fertilization oviducts
Made up of 3 layers,Hallow, muscular organ, shaped in a Y, uterine horns and the base forming the uterine body, uterus
simple columnar epithelium and simple tubular glands that secrete mucus and other substances endometrium
thickest layer of smooth muscle myometrium
covered by visceral layer of peritoneum perimetrium
Muscular Valve that seals off the uterus from the outside world Tightly closed except during estrus and parturition Opens during estrus to admit spermatozoa during breeding cervix
is a tube that receives the penis at breeding time and acts as birth canal during birthing time Lined with mucous glands which help lubricate vagina
visible to the outside world vulva
entrance into the vagina vestibule
Composed of erectile tissue and glans that are supplied with sensory nerve endings clitoris
lips that form the external boundary of the vulva labia
period when the female is receptive to the male (heat period) estrus
cattle and swine, cycle continuously throughout the year polyestrus
horses, sheep, and cats cycle continuously at certain times of the year seasonally polyestrus
dogs have two cycles per year one in the spring and one in fall diestrus
foxes and minks, only one cycle per year monoestrus
Created by: maiken



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