Anatomy of the Cat

by Jacob Reighard; H. S. Jennings

1. Note the constrictor vestibuli, caudovaginalis, and urethralis muscles ([p. 272], and [Fig. 114]).

2. Introduce a probe from the uterus into the vagina and feel with the finger for the hard cervix uteri ([p. 266]). Then open the vagina on the side, but do not cut the os uteri ([p. 266]).

3. Examine the cervix uteri and os uteri ([p. 266]).

4. Introduce a probe through the neck of the bladder and note its emergence into the urogenital sinus.

5. Find the end of the clitoris ([p. 267]), and its prepuce, and then dissect the integument carefully from about the external opening of the urogenital sinus and note an external sphincter of the sinus (M. levator vulvæ) ([p. 272], and [Fig. 114]), equivalent to the levator scroti in the male and continuous with the external sphincter ani.

6. Find (if possible) the corpora cavernosa of the clitoris ([p. 267]) and the ischiocavernosi muscles ([p. 269]).

DISSECTION OF THE CIRCULATORY SYSTEM.

I. The Heart ([p. 274], and [Figs. 115]-[117]).

Use the heart from the specimen dissected for the muscles, or from the specimen on which the viscera were studied.

1. Study the outside ([p. 275], and [Figs. 115] and [116]), and learn to recognize all parts. Find the pulmonary veins ([p. 275], and [Fig. 116], g, h, i) and cut them, thus separating the heart from the lungs.