Male Reproductive System Flashcards
(17 cards)
Sexual reproduction = ?
new individual
Formed by the testes and ovaries
Gametes (sperm and egg)
Fusion of ___ to give new individuals
Gametes
-Produce gametes and secrete sex hormones
Gonads
-Gonads ducts, glands, supporting structures
Reproductive System
- Sperm formation
- Protected by Scrotum
- Where LH and FSH will travel to through blood streams
- Each lobule is filled with 2 or 3 seminiferous tubules where sperms are formed
Testis
- Cools testis
- Sperm requires 2-3 degrees lower temperature than core body temperature
- Elevates testes on exposure to cold and during arousal (warmths reverses the process)
Scrotum
- Sperm maturation
- Makes sure sperm goes out of testis
Epididymis
- Sperm duct
- the single connecting long coil that carries sperm from epididymis
Vas Deferens
Order of Sperm process
Testis Epididymis Vas Deferens Seminal Vesicle Prostate Gland Coopers Gland Urethra
-Secretes 60% of clear, alkaline seminal fluid, with fructose sugar, ATP and prostaglandins for normal sperm nutrition and function chemicals for coagulation of semen
Seminal Vesicles
-Secretes 30% of milky, slightly acidic seminal fluid with an antibiotic to kill bacteria
Prostate
-Secretes clear, alkaline mucus to buffer and lubricate urethra
Cowpers Gland
- Sperm + Seminal Fluid
- 60% = Seminal vesicles, 30% prostate
- Contains nutrients, clotting proteins and antibiotic to protect sperms
- 2.5 to 5 ml in volume every ejaculate
- Normal count is 50 to 150 million/ml
Semen
-Blood enters the penis compressing the veins so that the blood is trapped
erection
- Muscle contractions close sphincter at base of bladder
- Fluids propelled through ductus deferens, seminal vesicles and ejaculatory ducts into bulb of penis
- Prostatic fluid secreted into urethra
Emission
-Skeletal muscles squeeze semen out through urethra
Ejaculation
