Gross Anatomy Flashcards
Testis:
Male gonad; produces sperm.
Epididymis:
Coiled tube; superficial to testis; holds maturing sperm
Scrotum:
External pouch; holds testes outside body cavity
Spermatic cord:
Wraps structures that connect and support the testis
Ductus deferens:
Tube that conducts sperm from testis to prostate
Inguinal canal:
Tunnel that allows passage of spermatic cord
Seminal vesicle:
Gland that makes most of semen contents
Prostate gland:
Donut shaped gland, secrets fluid to activate sperm
Bulbourethral gland
Tiny red gland that produces mucus to drain penile urethra
Ejaculatory duct:
Short tube that conducts seminal fluid and sperm to urethra
Urethra
Conducts sperm outside of body
Penis
Male copulatory organ
Glans penis
Enlarged tip
Prepuce
Cuff of foreskin usually removed at birth
Erectile tissue:
Fills with blood during sexual excitement, causes erection; spongy tissue
Seminiferous tubule:
Location of sperm production
Sperm head
Contains DNA
Sperm tail:
Flagellum; enables swimming
Interstitial cell:
Produces testosterone
Mitosis:
Cell division that takes place to accomplish growth or tissue repair
Meiosis:
Cell division for sexual reproduction purposes
In humans how many chromosomes are in the nuclei of brain cells, skin cells, muscle cells, pancreas cells, and liver cells?
46
Cells that are not sex cells
Somatic cells
All somatic cells are
2N
If a somatic cell divides, the resulting daughter cells are?
Identical
Mature gametes have ___ chromosomes?
23
Seminiferous tubules contribution to semen composition:
Sperm (5%)
Prostate gland contribution to semen composition
Slightly acidic, antibiotic fluid (30%)
Bulbourethral gland contribution to semen composition
Alkaline lubricating fluid (less than 5%)
Seminal vesicles contribution to semen composition
Sugar, vitamin C, prostaglandins, clotting proteins (60%)
Spermatogenesis
Sperm production
Spermiogenesis
After meiosis
How many chromosomes are present in the nucleus of a spermatogonium?
46 (2N)
FSH
Produced by Anterior Pituitary. Produces sperm.
ICSH (LH in girls)
Produced by Anterior Pituitary. Released by testosterone.
Testosterone
Produced by Interstitial cells. Secondary sex characteristics
Inhibin
Produced by seminiferous tubules. Inhibits FSH secretion