University:
Sam Houston State University
Course:
BIOL 2413 | General Zoology
Academic year:

2020
Views:

380

Pages:

10
Author:

GalacticGuru

Animal Reproduction Hormones  Male   Testosterone- critical for sperm development Female     Estrogen- critical for follicle development Progesterone- sustains pregnancy and inhibits new follicle development Relaxin- causes ligaments around birth canal to relax Oxytocin- causes milk letdown Male Reproductive System  Testicles   Epididymis  Site of sperm production and testosterone synthesis Sperm contain ½ of genetic makeup Sperm storage and maturation Scrotum Protects testes and regulates temperature Male Reproductive System  Vas Deferans  Urethra  Transports sperm from epididymis to urethra tube inside of penis transports sperm or urine exterior Penis organ of copulation Female Reproductive System  Ovaries   Oviducts   Produce egg Egg contains ½ of genetic makeup Site of fertilization Transport embryos to uterus Uterus Site of embryonic development during gestation Female Reproductive System  Cervix   Vagina   Connects uterus and vagina Serve as barrier during pregnancy Female organ of copulation at mating Opening of bladder Vulva External opening of reproductive system Different Female Reproductive Systems Events of Reproduction   Puberty- Age at which reproductive organs become functional Female- Reproduction process occurs within    Fertilization- Egg & Sperm unite    Estrous cycle- Repetitive cycle occurring when pregnancy does not Estrus- “Heat” or receptivity to mating Only real male contribution is the sperm Gestation- Length of time of pregnancy Parturition- Act of giving birth Age of Puberty  Cattle:  Sheep:  Swine:  Horses:  Humans: 6 to 12 Months 5 to 7 Months 4 to 8 Months 12 to 15 Months 9 to 16 YEARS Estrous Cycle Cattle: Polyestrous (cycle throughout year)  Sheep: Seasonal (Decreasing light, Fall)  Swine: Polyestrous (cycle throughout year)  Horses: Seasonal (Increasing daylight, Spring) 