Accessory glands contain variety of components and
ions including citric acid, inositol, and prostaglandin
A. Vesicular glands (seminal Vesicles)
1. Paired glands
2. Located at junction of urethra & vas
deferens
3. Have rough structure
4. Contribute large amount of fluid
5. Add the following
a. Fructose & sorbitol --
energy sources
b. Phosphate & bicarbonate --
buffers
B. Prostate Gland
1. Located caudal to seminal vesicles and close
proximity to pelvic urethra
a. Bilobed in bull & boar
b. Diffuse in ram
c. Surrounds urethra in dogs & humans
2. Only accessory gland in dog
3. Function = cleanse & lubricate
4. Secretes just prior to & during
ejaculation
C. Bulbourethral Glands (Cowper’s gland)
1. Paired glands
2. usually buried under bulbospongiosus muscle
3. Small & round in bull, ram, stallion, and
man
4. Larger & longer in boar
5. Function:
a. Bull, etc.
- cleanse urethra
prior to ejaculation
b. Boar
- produces gel
fraction
- adds
considerable volume
D. Colliculus Seminalis
1. Region of urethra where sperm mixes with S.V.
secretions
2. Mixing incomplete in stallion, boar
a. Sperm-free fraction & Sperm-rich fraction
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