Anatomy of Reproductive System in the Cat

Anatomy of Reproductive System in the Cat

Locate each of the following features (sex appropriate) in your cat, note the role of each in the reproductive process, and make a quick illustration showing the spatial relationships between them and other major landmarks in the abdominal cavity and groin.

After you have found the features appropriate to the sex of your cat, show them to a second pair of students who have the opposite sex cat, and have them do the same for you. (You show them yours, they show you theirs…)

Three illustrations:
1) female anatomy
2) male anatomy
3) dissected scrotum, at the bottom of the male’s page.

See Gilbert’s  Pictorial Anatomy of the Cat, pp: 52-59.

I. FEMALE: (pp. 54 & 55)
Here are the features you should identify in the following pictures

ovarian arteries, R & L
ovarian veins, R & L (carefully note origin of L vein)
fimbriae (surround ovary like catcher’s mitt)
abdominal ostium (opening to Fallopian tubes)
Fallopian tube (circle behind ovary to uterine horn, very short)
uterine horns (cats have two horns)
ovarian ligament (ties ovary to uterine horn)
broad ligament (ties uterine horn to abdominal wall, formed by folding of the peritoneum)
round ligament (imbedded in a fold of the broad ligament)
body of uterus (where two uterine horns join, behind bladder)

Here is a labeled version of the first image.


left ovary, vessels and uterine horn, first with peritoneum, then peritoneum removed.

ovary_fallopian_undisc_P5204327

Undissected left female reproductive tract. Note the tract is retroperitoneal.
Here is a labeled version of the image.

ovary_P5274360

Right ovary with fimbria pulled back, vessels and uterine horn. Ovaries in the cat are the size and shape of pine nuts.
Here is a labeled image of the left ovary with the fimbria pulled back.

BROAD AND ROUND LIGAMENTS:

First image shows the left tract
Here is a labeled image of the ligaments of the female reproductive tract.
The second image shows the right tract.

fimbria_P5274359

the probe has been inserted under the fimbria of the R side

fallopian_tube_P5274361

ovarian ligament, indicate with the needle, ties ovary to fallopian tube

broad_ligament_P5274357

broad ligament with probe underneath, ovary at extreme right of image

ostium_P5274363

the osteum leadds from inside the fibria into the fallopian tube. Ovary at extreme right.

uterine_body_P5274362

uterine body, bladder pulled down


Images of two cats which were pregnant.

II. MALE: (pp. 52,53 & 56) Here is an illustration of the overview of the male reproductive tract.

02_testicular_vein_P5204338

kidney & renal veins
testicular arteries R & L
testicular veins R & L (carefully note L vein)
vas deferens (also called ductus deferens)
Here is a labeled version of the image.


The right inguinal canal receives the right testicular artery and vein and the right vas deferens.
Here is a labeled version of the image.

03_inguinal_canal_P5204331

vas deferens (also called ductus deferens)
(loops over ureter at the bladder)
bladder and ureters (Show vas looping over)
Here is a labeled version of the image.

04_ingunal_canal_ext_P5204333

inguinal canal (receives arteries, veins and vas deferens)
[Not a very clear image…]

06_spermatic_cord_P5204340

spermatic cord (all the above wrapped in peritoneum, anterior to pubis)

08_spermatic_cords_P5204332

Both spermatic cords can be seen in this image. The left spermatic cord descend to the left testis.
Here is a labeled version of the image.

III. SCROTUM DISSECTION:

09_testis_exposed_P5204329
Shallowly snip open the tip of the scrotum. Snip skin towards body to free tunica vaginalis-encased testis.
(Gilbert, p. 58)
scrotum
testes

10_pull_testis_P5204330

Pull down on testis, cut spermatic cord high up.

Slip tip of scissors into sleeve, snip to “peel” tunica vaginalis from contents:
tunica vaginalis
gubernaculum

14_tunica_vaginalis_opened_P5204347

The testis has been revealed by cutting and peeling back the parietal tunica vaginalis
epididymis and testis
vas deferens
Here is a labeled view of the medial and lateral views of the scrotal contents.
Here is a diagram of the features of a disected testis.

Other Images:

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