Rat reproductive system
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Rat Reproductive System. Dissection. Pre-lab. Prepare the dissection tray and equipment. Put on your gloves. Retrieve your rat from the tray in your cabinet. Remove the skin from around your rat and place it in your zip-lock bag. Lay the rat in the dissection tray ventral side up.

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Rat Reproductive System

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Rat reproductive system

Rat Reproductive System

Dissection


Pre lab

Pre-lab

  • Prepare the dissection tray and equipment.

  • Put on your gloves.

  • Retrieve your rat from the tray in your cabinet.

  • Remove the skin from around your rat and place it in your zip-lock bag.

  • Lay the rat in the dissection tray ventral side up.


Sharing your rat

Sharing Your Rat

  • While one group at the table dissects the female rat, the other group will dissect the male rat.

  • After you complete your section of the lab report, switch rats.

  • Female begins at slide 4.

  • Male begins at slide 13.


Female structures ovaries

Female Structures- Ovaries

Look for the ovaries embedded in adipose tissue.

Fallopian tube

Ovary


Female structures ovaries1

Female Structures- Ovaries

In the rat, the ovaries are located at the superior end of the uterine horn. In each picture, the probe is pointing to the ovaries.


Female structures ovaries2

Female structures- Ovaries

Note the blisters on the ovaries. These may be developing follicles which contain the secondary oocyte.


Female structures uterus

Female Structures: Uterus

This is the V-shaped uterine horn in a rat that is not pregnant


Female structures uterus1

Female Structures: Uterus

The uterine horns meet at a structure called the "body of the uterus".

The body opens at the cervix into the vagina.

Note the bladder in the foreground.


Female structures uterus2

Female structures: Uterus

This is the V shaped uterine hornin a pregnant rat.

The rat embryos are developing in these horns.


Female structures uterus3

Female Structures- Uterus

A uterine horn containing well developed embryos.


Female structures that support the developing embryo

Female Structures that Support the Developing Embryo


A very immature embryo

A very immature embryo


Male structures scrotum

Male Structures-Scrotum

Scrotum


Scrotum testes

Scrotum- Testes

Cut open the scrotum and scrotal sacs to reveal the epididymis and testes.

Testes

Epididymis


Male structures vas deferens

Male Structures- Vas Deferens


Male structures seminal vesicles

Male Structures- Seminal Vesicles

Seminal vesicle


Male structures prostate gland

Male Structures- Prostate Gland

bladder

The rat has two prostate glands located under the bladder. A male human only has one prostate gland.


Male structures penis

Male Structures- Penis

If it has not already been done, cut anteriorly into the urogenitalopening. This will expose the penis.


Clean up

Clean-up

Place your rat in your zip-lock bag and throw the bag with the rat in the garbage. No tears please.

Clean and dry your instruments.

Forever


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