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Dog Anatomy - Genital Organ Functions of the Male Dog

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Deferent Duct
The vas deferens, is part of the male anatomy of many vertebrates; they transport sperm from the epididymis in anticipation of ejaculation.
Ureter
u·re·ter :The duct by which urine passes from the kidney to the bladder or cloaca.
Bladder
blad·der :A membranous sac in humans and other animals, in which urine is collected for excretion.
Spermatic Cord
sper·mat·ic cord :A bundle of nerves, ducts, and blood vessels connecting the testicles to the abdominal cavity.
Prepuce
The sheath of skin that covers the penis.
Penile Bone
The baculum (also penis bone, penile bone or os penis) is a bone found in the penis.The bone aids in sexual intercourse.
Scrotum
scro·tum :A pouch of skin containing the testicles.
Testis
tes·tis :An organ that produces spermatozoa (male reproductive cells).
Epididymis
ep·i·did·y·mis :A highly convoluted duct behind the testis, along which sperm passes to the vas deferens.
Bulbospongiosus
Bulbospongiosus is one of the superficial muscles of the perineum. It has a slightly different origin, insertion and function. In males, it covers the bulb of the penis.
Urethra
u·re·thra :The duct by which urine is conveyed out of the body from the bladder, and which in male vertebrates also conveys semen.
Prostate Gland
A gland in male mammals surrounding the urethra just below the urinary bladder that controls the release of urine from the bladder and produces a secretion that is the fluid part of semen.