Male Anatomy Flashcards
________ is not a part of the spermatic cord.
A) Ductus deferens
B) Cremaster muscle
C) Pampiniform plexus
D) Epididymis
D) Epididymis
All of the following have a fibroelastic penis except ________.
A) Bull
B) Ram
C) Stallion
D) Boar
C) Stallion
Vesicular glands are absent in ________.
A) Bull
B) Stallion
C) Dog
D) Tomcat
C) and D)
All of the following about the bull reproductive system is correct except ________ and ________.
A) The testicles are paired
B) The testicles are located within the abdominal cavity
C) The testicles produce spermatozoa
D) The testicular size varies throughout the year
E) The testicles produce male sex hormones
F) The testicles are pendulous and have an elongated neck
B) and D)
_______ and _______ are not parts of scrotal layers.
A) Scrotal skin
B) Scrotal fascia
C) Parietal vaginal tunic
D) Tunica dartos
E) Tunica albuginea
F) Ductus deferens
E) and F)
All of the following statements about the thermoregulation of the testis are correct except _________ and __________.
A) Complex process that maintains the testes at conditions ideal for spermatogenesis
B) The tunica dartos, a skeletal muscle, maintains rigidity to alter the body temperature
C) The testicular vascular cone operates as a counter-current heat exchanger
D) Pampiniform plexus has no role in the thermoregulation of the testis
E) Scrotal sweating and thermal polypnea are involved in testicular thermoregulation
F) The scrotal skin contains temperature receptors that can respond to lower body temperature
B) and D)
True or false: Testis produces seminal plasma
False; the accessory sex glands do
True or false: Rooster scrotum is located in the inguinal region
False; the testes are located in the abdominal cavity
True or false: Testosterone defeminizes the hypothalamus during embryogenesis and eliminates GnRH surge center in the male
True
True or false: Male farm animals acquire ability to produce sperm from birth
False
True or false: Bull penis has bulbous glands
False; the dog penis does
Match the male reproductive organ to the function:
1) Testis
2) Scrotum
3) Spermatic cord
4) Epididymis
5) Penis
A) Protective sac of the testicles
B) Storage of the sperm
C) Production of male gametes
D) Male copulatory organ
E) Connects testes to the body
1) C
2) A
3)
4)
5) D
What are the basic components of the male reproductive system?
testis, scrotum, spermatic cord, excurrent duct system, accessory sex glands, penis and its muscles
What are the three major functions of the male reproductive system?
Production of spermatozoa in the testes; maturation, storage, and transport of spermatozoa within the duct system; deposition of semen within the female genital tract
Describe the structure and location of the testes
Primary male reproductive organ; paired, capsulated, ovoid-like structures that lie outside the abdomen at the inguinal region, within the scrotum
Describe the difference in position and orientation of the testes in the scrotum across species
Ruminants: vertical
Stallion: horizontal
Boar and tomcat: tilted towards anus
Does testicular size vary throughout the year in seasonal breeders (ram, stallion, camel)?
Yes
What are the functions of the testes?
Production of male gametes (spermatozoa), production of male sex hormones, secretion of fluids
Describe the structure of the scrotum
Purse-like structure derived from the skin and fascia of the abdominal wall; two-lobed sac.
Bull: pendulous and has an elongated neck
Other species: closely applied to the inguinal region
What are the scrotal layers, from outer to inner?
Scrotal skin, tunica dartos, scrotal fascia, and parietal vaginal tunic
What are the functions of the scrotum?
Thermosensor, swamp cooler, and protective sac
What does the spermatic cord do?
Connects the testis to the body (extends from the inguinal ring to its attachment on the dorsal pole of the testis); provides the pathway to and from the body of the testicular vasculature, lymphatics, and nerves; hosts the ductus deferens, the cremaster muscle, and a specialized vascular network called the pampiniform plexus
Describe each of the accessory sex glands:
Ampullae: enlargement of the ductus deferens that open directly into the pelvic urethra.
Vesicular gland: paired glands that lie dorsocranial to the pelvic urethra
Prostate gland: lies dorsal to the urethra between and caudal to the vesicular glands
Bulbourethral gland: lies on each side of the medial plane dorsal to the urethra
What is the function of the accessory sex glands?
Production of seminal plasma
