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Male Sexual Anatomy and Physiology
Sexuality Now Chapter 6
47
Anatomy
Undergraduate 2
06/10/2012

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Term
Penis
Definition
The male urinary and sexual organ. Major organ of male sexual pleasure and is homologous to the female clitoris.
Term
Semen
Definition
A thick, whitish secretion of the male reproductive organs, containing spermatozoa and secretions from the seminal vesicles, prostate, and bulbourethral glands.
Term
Erection
Definition
The hardening of the penis caused by blood engorging the erectile tissue.
Term
Corpora cavernosa
Definition
area in the penis that fill with blood during erection.
Term
Corpus spongiosum
Definition
"Spongy body" the erectile tissue in the penis that contains the urethra.
Term
glans penis
Definition
The flaring, enlarged region at the end of the penis.
Term
Corona
Definition
The ridge of the glans penis.
Term
Frenulum
Definition
Fold of skin on the underside of the penis.
Term
Meatus
Definition
The urethral opening at the opening of the penis.
Term
Foreskin
Definition
The fold of skin that covers the glans penis; also called the prepuce.
Term
Circumcision
Definition
The surgical removal of the foreskin of the penis.
Term
Smegma
Definition
The collected products of sweat and oil glands that can accumulate under the foreskin.
Term
Scrotum
Definition
External pouch of skin that contains the testicles
Term
cremaster muscles
Definition
the suspender muscle that raises and lowers the scrotum to control scrotal temperature.
Term
Nocturnal emissions
Definition
involuntary ejaculation during sleep, also referred to as a wet dream.
Term
spermatogenesis
Definition
the production of sperm in the testes.
Term
seminiferous tubules
Definition
The tightly coiled ducts located in the testes where spermatozoa are produced
Term
spermatozoon
Definition
A mature sperm cell.
Term
spermatogonium
Definition
an immature sperm cell that will develop into a spermatocyte
Term
spermatocyte
Definition
the intermediate stage in the growth of a sperm cell
Term
spermatids
Definition
final intermediate stage in production of sperm
Term
flagellum
Definition
tail like end of sperm that propels it forward
Term
interstitial cells
Definition
cell responsible for the production of testosterone
Term
epididymis
Definition
a comma shaped organ that sits atop the testicle and holds sperm during maturation
Term
vas deferns
Definition
one of two long tubes that convey the sperm from the testes and in which other fluids are mixed to create semen
Term
ejaculation
Definition
reflex ejection or expulsion of semen from the penis
Term
ampulla
Definition
base of vas deferens, where the vas hooks up over the ureter of the bladder
Term
seminal vesicles
Definition
the pair of pouch like structures lying next to the urinary bladder that secrete a component of semen into the ejaculatory ducts.
Term
ejaculatory duct
Definition
a tube that transports spermatozoa from the vas deferns to the urethra
Term
prostate gland
Definition
a doughnut shaped gland that wraps around the urethra as it comes out of the bladder, contributing fluid to the semen.
Term
bulbourethral gland
Definition
one of a pair of glands located under the prostate gland on either side of the urethra that secretes a fluid into the urethra; also called cowper's gland.
Term
erogenous zone
Definition
any part of the body which when stimulated induces a sense of sexual excitement or desire.
Term
andropause
Definition
the hormonal changes accompanying old age in men that correspond to menopause in women.
Term
Osteoporosis
Definition
a disease in which bones become fragile and more likely to break.
Term
anemia
Definition
a condition in which there is a deficiency in the oxygen carrying material of the blood.
Term
inguinal canal
Definition
canal through which the testes descent into the scrotum
Term
cryptorchidism
Definition
a condition in which the testes fail to descend into the scrotum.
Term
testicular torsion
Definition
the twisting of a testis on its spermatic cored, which can cause severe pain and swelling.
Term
priapism
Definition
a condition in which erections are long lasting and often painful.
Term
Peyronie's disease
Definition
Abnormal calcification in penis, which may cause painful curvature, often making sexual intercourse impossible.
Term
androgen
Definition
the general name for male hormones such as testosterone and androsterone.
Term
inguinal hernia
Definition
a condition in which the intestines bulge through a hole in the abdominal muscles of the groin.
Term
hydrocele
Definition
a condidtion in which there is an excessive accumulation of fluid within the tissue surrounding the testicle, which causes a scrotal mass.
Term
benign prostatic hypertrophy
Definition
the common enlargement of the prostate that occurs in most men after about age 50
Term
prostate-specific antigen
Definition
Blood test that measures levels of molecules that are overproduced by prostate cancer cells, enabling physicians to identify prostates cancer.
Term
Radical prostatectomy
Definition
the surgical removal of the prostate.
Term
radiation
Definition
the use of radioactivity in the treatment of cancer
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