GENITAL ORGANS OF THE BULL.
The testicles are ovoid in shape and well developed, its long axis being nearly vertical; the membrane which separate the two testicles is very strong.
The spermatic cord and artery are small compared with those of the horse.
The penis is long and pointed, and has an S-shaped curve in it just below the pelvic bones; this curve can be felt by feeling just behind the bag.
The sheath is long and runs further forward on the belly. It has a tuft of hair on the point of it. During the time the bull is serving the S-shaped part of the penis is straightened out by the action of the protracter muscles, and drawn back into the S-shaped curve by retractor muscles.
The urethra is completely enveloped by the fibrous sheath.