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Male Reproduction - Coggle Diagram
Male Reproduction
Dog and Tom cat
Erectile tissue in the bulbis glandis; Dog does not have a bulbourethral gland, but all other species do
Tail of epididymis points towards the tail 
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Prostate gland in the dog is similar to a "barbies butt", uniform and fairly firm
Tom cat - penile spines that are testosterone dependent ; tom cats also have both a prostate and a bulbourethral gland
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Stallion
Erectile penis, by blood flow; bulbourethral gland produces pre-ejaculate; very pronounced ampulla that empties into the colliculus seminalis with vesicular gland openings
Glans penis - corpus spongiosum come all the way to the tip (first pencil shaped then bells and urethral process will thread the cervix)
Scrotum is ventrally oriented, tail of the epididymis points towards the tail
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Boar
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Vesicular glands and bulbourethral glands are very prominent; very prominent urethralis muscle and bulbourethralis muscle
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Bull (prey animal)
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Intermission, ejaculation, and dismounting happens very quickly; intervaginal ejaculator
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Retractor penis muscle, glans penis, cremaster muscle is well developed; frequent vesicular gland infection
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