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The Reproductive System
The Male Organs
25
Anatomy
Undergraduate 4
08/30/2008

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Term
Prepuce
Definition
Fold of skin over end of penis.
Term
Glans penis
Definition
The distal enlarged end of penis.
Term
Erectile tissue of penis
Definition
There are (3): two corpus cavernosa, & one corpus spongiosum.
Term
Septum penis
Definition
Separates the two corpus cavernosa.
Term
Tunica albuginea
Definition
Layer in the penis that covers the (2) corpus cavernosa.
Term
Tunica dartos
Definition
Layer in the penis that surrounds all three of the erectile tissues.
Term
Penile urethra
Definition
Surrounded by the corpus spongiosum.
Term
Bulb of penis
Definition
The proximal enlarged end of penis.
Term
Accessory Glands
Definition
There are (3): The seminal vesicles, prostate gland, & bulbourethral gland. They contribute alkalie secretions to the seminal fluid, which stimulates sperm motility.
Term
Ampulla of vas deferens
Definition
The enlarged terminus of the vas deferens.
Term
Cremaster Muscle
Definition
Temperature sensative so it raises & lowers the testis to maintain an internal testicular temperature of 94-95 degrees F. Higher temps will stop the spermatozoa from maturing.
Term
Spermatic cord
Definition
Contains vas deferens, nerves, & blood vessels that supply the testis.
Term
Vas Deferens
Definition
A tube the mature spermatozoa leave the epididymis through and travel to the common ejaculatory duct. This occurs when ejaculation happens. Also vas deferens is the central canal of the spermatic cord.
Term
Epididymis
Definition
Pouch on the posterior exterior surface of testes. Where the mature spermatozoa are stored.
Term
Rete Testis
Definition
The joining of the seminiferous tubules make the rete tesis. Spermatozoa travel through them to the epididymis.
Term
Seminiferous tubules
Definition
They are coiled up inside the chambers of the testes and produce spermatozoa. Spermatogonia are near the basement membrane. Mature sperm cells are near the lumen. They contain sertoli cells (sustentacular cells) inside them.
Term
Testes
Definition
The Primary sex organ of the male reproductive system.
Term
Tunica vaginalis
Definition
Double layered serous membrane that partially surrounds each testis.
Term
Scrotum
Definition
A sac the testes lie in. The outer skin of the testes.
Term
Leydig cells (Interstitial cells)
Definition
Secrete (make) testosterone. These cells surround the seminiferous tubules.
Term
Sertoli cells (Sustentacular cells)
Definition
sertoli cells function properly from the binding between testosterone & receptors in the sertoli cells. testosterone is converted into two other steroids in the sertoli cell, they are DTH & Estrogen. These cells also secrete a protein called androgen-binding protein into the seminiferous tubules.
Term
Emission
Definition
The discharge of the secretions of the seminal vesicles, prostate gland, & bulbourethral glands with sperm cells from the epididymis into the urethra to form semen.
Term
Mucous secretion just before Ejaculation
Definition
Bulbourethral glands & urethral mucous glands produce a mucous secretion before ejaculation which lubricates the urethra to neutralize it from its normal acidity. The accessory glands provides small amount of lubrication during intercourse and help to reduce vaginal acidity.
Term
Ejaculation
Definition
Forceful expulsion of semen from the urethra caused by the contraction of the urethra, & muscles in penis.
Term
Steroid
Definition
4 fused carbon rings plus side chains. Lipid based. Diffuse through phospholipid bilayer, binding to intracellular receptor. (testosterone is a steroidal hormone).
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