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ANATOMI DAN FISI OLOGI REPRODUKSI TERNAK Oleh : Nurul Isnaini. PERBANDINGAN ORGAN REPRODUKSI TERNAK JANTAN. Diagram of the reproductive system of the (a) bull; (b) ram; (c) boar; and (d) stallion. Male Reproductive Tract. Bull Reproductive Tract. Male Reproductive Tract.
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PERBANDINGAN ORGAN REPRODUKSI TERNAK JANTAN Diagram of the reproductive system of the (a) bull; (b) ram; (c) boar; and (d) stallion.
Organ reproduksi ternak jantan dapat dibagi menjadi 3 bagian: • Organ kelamin primer gonad jantan, testis / testiculus • Kelenjar pelengkap dan sistem saluran • Alat kelamin luar (organ kopulatoris penis)
BAGIAN ORGAN RPR TERNAK JANTAN: • Scrotum • Testis • Epididimis • Vas deferens • Uretra • Ampula • Vesica seminalis • Prostata • Cowper’s gland • Penis • Preputium
Testes produce sperm & testosterone Sperm production occurs in seminiferous tubules See Fig. 46.12
Testes produce sperm & testosterone Sperm production occurs in seminiferous tubules At puberty, testosterone production begins in interstitial cells See Fig. 46.12
Testes produce sperm & testosterone Sperm production occurs in seminiferous tubules Sertoli cells regulate sperm production & nourish developing sperm See Fig. 46.12
Testes produce sperm & testosterone Sperm production occurs in seminiferous tubules Spermatozoa are produced by spermatogonia See Fig. 46.12
Head Nucleus – DNA Acrosome – Enzymes Human sperm – almost no cytoplasm; carries male DNA to egg DNA See Fig. 46.12
Head Nucleus – DNA Acrosome – Enzymes Midpiece Mitochondria – Energy Human sperm – almost no cytoplasm; carries male DNA to egg DNA See Fig. 46.12
Head Nucleus – DNA Acrosome – Enzymes Midpiece Mitochondria – Energy Tail Flagellum – Propeller Human sperm – almost no cytoplasm; carries male DNA to egg DNA See Fig. 46.12
THE FEMALE REPRODUCTIVE SYSTEMThere are 7 major parts of the female reproductive system:1. 2.3. 4.5.6.7. Ovaries Oviducts Uterine horns (2) Body of the uterus Cervix Vagina Vulva
Oviduct CL Ovary
Uterus Cervix Vagina & Vulva missing
Female Reproductive System • Cervix • Area between the uterus and vagina • Normally closed • Opens at estrus and parturition • (2 -3 inches)
Female Reproductive System • Vagina - the female organ of copulation 1. admits penis 2. receives semen (except in sow) 3. passageway for fetus at parturition • Bladder - storage organ for urine • Vulva - extended genitalia; opening for both urinary and genital tracts
Sow Uterine horns
Uterus Oviduct Ovary
Sow Ovary Follicles
Vagina Vulva Bladder
Hormonal control of the oestrus cycle:Hormones from the brain’s “master gland” (pituitary) initiate development of egg-bearing follicles in the ovary
Hormonal control of the oestrus cycle:Estrogen produced by egg-bearing follicles stimulates the growth of the uterine lining
Hormonal control of the oestrus cycle:If pregnancy does not begin: 1) The corpus luteum breaks down2) Progesterone levels fall
Fertilization may lead to pregnancy…Sperm deposited in the vagina during copulation swim through the uterus into the Fallopian tubes, where they may encounter an egg Sperm Sperm Sperm Sperm Oocyte (egg)
Fertilization may lead to pregnancy…Sperm release enzymes that break down the barriers around the egg (corona radiata and zona pelucida) oocyte Zona pellucida – jelly-like layer around egg Corona radiata – layer of accessory cells around egg
Fertilization may lead to pregnancy…Fusion of the nuclei of an egg and one sperm (fertilization) produces a zygote oocyte Zona pellucida – jelly-like layer around egg Corona radiata – layer of accessory cells around egg
Reproduction in Poultry Objective: Specify how the reproductive system for poultry functions
Reproduction in Poultry The poultry reproduction tract has five parts: 1) Vagina • Holds the egg until laid 2) Uterus • Secretes the shell 3) Isthmus • Adds the two shell membranes 4) Magnum • Secretes the albumen 5) Infundibulum • Where fertilization takes place
Reproduction in Poultry • Major difference: • Embryo of livestock develop inside the female’s body while the embryo of poultry develops inside the egg. • Poultry only have the left ovary and oviduct when mature • The yolk is the ovum • Chicken Incubation • 21 days