Chapter 16 reproductive reverse Flashcards
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sperm production
secrete testosterone
Male Reproductive system functions
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testes
Male reproductive primary organs
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epididymis
vas deferens
ejaculatory duct
urethra
Male reproductive duct system
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seminal vesichles
prostate
bulbourethral gland
Male reproductive accessory organs
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scrotum
penis
Male external genitalia
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capsule that surrounds each testis
Tunica albuginea
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testes lobule containing tightly coiled seminiferous tubules
site of sperm production
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support and nourish sperm
regulate sperm production
sertoli cells
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produce sperm
Spermatogonia
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between seminiferous tubules
produce androgens such as testosterone
interstitial cells
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6 meters of coiled tube: found in the superior part of the testis and slong the posterior lateral side
site of sperm maturation and storage
concentration of muscles in the wall of the epididymis expels sperm with the vas deferens
Epididymis
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carries sperm from the epididymis to the ejaculatory duct
Vas Deferens
Ductus Deferens
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smooth muscle in the walls of the vas deferens create peristaltic waves to squeeze the sperm forward
ejaculation
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cutting the vas deferens at the level of the testes to prevent the transportation of sperm
vasectomy
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short duct that connects the vas deferens to the urethra
within the prostate gland
Ejaculatory duct
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extends from the base of the urinary bladder to the tip of the penis
carries urine and sperm
sperm enters from the ejaculatory duct
urethra
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located posterior to the urinary bladder
secretes alkaline fluid into ejaculatory ducts:
fructose-energy for sperm
60% of final semen volume
seminal vesicles
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inferior to urinary bladder
secretes alkaline fluid:
helps activate sperm
enters the urethra through several small ducts
prostate gland
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pea sized glands inferior to the prostate
produce a thick clear mucus
cleanses the urethra of acidic urine
serves as lubricant during sex
secreted into the penile urethra
bulbourethral glands
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mixture of sperm and accessory gland secretions:
alkaline pH: 7.2-7.6 (neutralizes vaginal secretions)
volume 2-5ml
average sperm count: 120 million per ml
semen
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non mobile with the male reproductive system
begin to swim in an alkaline environment
sperm
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changes that allow sperm to fertilize egg
occurs within the female reproductive tract
capacitation
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divided pouch of skin posterior to the penis
maintains the testes about 3 deg C lower than body temp to protect sperm
scrotum
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delivers sperm into the female reproductive tract
penis
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shaft
glans penis (enlarged tip)
prepuce (foreskin): folded cuff or skin around proximal end
often removed by circumcision
internally 3 areas of spongy erectile tissue
erections occur when erectile tissue fills with blood during sexual excitement
regions of the penis
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production of sperm cells
entire process takes 64-72 days
spermatogenesis
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meiotic cell division
begins at puberty and continues throughout life
occurs in the seminiferous tubules
production of sperm cells
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spermatogonium
primary spermatocyte 46 chromosomes
2 secondary spermatocytes 23 chromosomes
4 spermatids 23 chromosomes
4 sperm cells 23 chromosomes
spermatogenesis cycle