Male Reproductive System Flashcards
The pouch that supports the testes
Scrotum
Site of sperm cell production
Seminiferous tubules
Nourishes sperm cells and releases inhibin; serves as a blood-testes barrier
Sertoli or Sustentacular cells
Cells that produce testosterone
Leydig or Interstitial Cells
The internal connective tissue divider of the testes
Septum
The external scrotum contains what type of tissue?
Loose Connective
A smooth muscle responsible for reducing the size of the scrotum
Dartus Muscle
T or F: The scrotal muscles contract in warm temperatures and relax in cold temperatures
False (contracts in cold, relaxes in warm)
This muscle is an extension of the internal oblique abdominis into the scrotum
Cremaster Muscle
T or F: When the cremaster muscle pulls the testes upwards, it raises their body temperature
True
Very heat-sensitive cells that must develop at temperatures slightly lower than the rest of the body
Sperm Cells
Scrotal temperature is how many degrees lower than the body?
2-3 degrees
How many sperm cells complete spermatogenesis every day?
300 million
Length of a sperm cell
About 60 mm long
T or F: Sperm cells can only survive up to 48 hours within the female reproductive tract
True
Part of the sperm cell which contains a nucleus with condensed chromosomes
Head
Part of the sperm which covers the anterior 2/3 of the nucleus; filled with enzymes that help the sperm penetrate the egg cell
Acrosome
Part of the sperm cell that contains the neck, middle piece, principle piece, and end piece
Tail
This portion of the tail contains mitochondria arranged in spirals
Middle Piece
This organ belongs to both the reproductive (passage of semen) and urinary system (passage of urine)
Penis
Part of the penis that covers the corpora cavernosa and corpus spongiosum
Tunica Albuginea
Erectile tissues containing vascular spaces (blood sinuses)
Corpora cavernosa
Part of the penis that is pierced through by the urethra
Corpus spongiosum
Expanded distal end of the penis
Glans penis
Urethra that traverses the corpus spongiosum
Penile/Spongy Urethra
Expansion of blood sinuses (pooling of blood) in the corpora cavernosa in response to sexual excitation
Erection
The mechanism that releases seminal fluid as a sympathetic reflex
Ejaculation
Paired oval glands found within the scrotum
Testes