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Rat Dissection

Rat Dissection. Rat Classification. The Rat, Rattus norvegicus albinus, belongs to the Kingdom Animalia, phylum Chordata, Class mammaila, Order Rodentia, genus Rattus, and species norvegicus. . Orientation. External Anatomy. Sex?.

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Rat Dissection

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  1. Rat Dissection

  2. Rat Classification • The Rat, Rattus norvegicus albinus, belongs to the Kingdom Animalia, phylum Chordata, Class mammaila, Order Rodentia, genus Rattus, and species norvegicus.

  3. Orientation

  4. External Anatomy

  5. Sex? • On female rats, just posterior to the last pair of teats, you will find the urinary aperture and behind that the vaginal orifice which is in a small depression called the vulva. • On males, you will find a large pair of scrotal sacs which contain testes. Just anterior to the scrotal sacs is the prepuce, which is a bulge of skin surrounding the penis. The end of the penis has a urogenital orifice, where both urine and sperm exit. Can you tell which one is the male?

  6. Muscles

  7. Body Cavities Thoracic Cavity What organs are found in this cavity? What muscle would be indicated by the red line? Abdominal Cavity What organs are found in this cavity?

  8. Thoracic Cavity What are the names and functions of all the structures indicated by red arrows? 1 2 3 4 5 6 7

  9. Circulatory System in the Thoracic Cavity

  10. Thoracic Cavity What gland covers the heart and what is it’s function? What is this tube and what is it’s function? How many lobes total… How many on the right and on the left?

  11. Throat/Neck Region What are the structures indicated by the red arrows and what are their functions?... Hint… Number three is a gland that controls metabolism and is under control by the anterior pituitary. 4 3 1 2

  12. Abdominal Cavity • What organ is this? • How many lobes does it have? • What digestive functions does it have? • How does it help control blood glucose levels? • How does it function in the excretory system? • What does it do for the blood?

  13. Abdominal Cavity • What organ is indicated by pin #1? • How does it control blood glucose levels? • What digestive functions does it have? • What organ is indicated by pin #3? • What is it’s function? • Pin #4 is in the duodenum… Why is this an important location?

  14. Abdominal Cavity Can you name the structures?

  15. Male and Female Urogenital/Reproductive Systems Which is male and which is female?

  16. Male or Female? What are the structures labeled with red arrows? What are their functions? 1 6 2 5 3 4

  17. Male or Female? How is the uterus of the rat different from a humans? What structures are indicated by 3 through 7?

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