Study of rat- DEMONSTRATION OF RAT ANATOMY

DIGESTIVE SYSTEM OF RAT

1. Digestive system consists of alimentary canal and digestive glands.
2. Alimentary canal is made up of mouth, oesophagus, stomach, intestine, caecum, colon, rectum and anus.
3. Mouth- True mouth with clift in lower lip. Ingestion of food
4. Oesophagus- acts as a passage between mouth and stomach. It conducts the food from mouth to stomach by peristalsis.
5. Stomach- acts as temporary storage for food& its partial digestion, secrets HCI by oxyntic cells and peptic juice by gastric glands.
6. Intestine is divided ito three parts - Duodenum, ileum, colon, caecum and rectum. Anterior most part of intestine called duodenum which forms loop and entangles pancreas. The remaining part of intestine is long narrow ileum. It plays important role in digestion of food and absorption of digested food.
8. Caecum is present at the junction of ileum and colon. It contains cellulose digesting bacteria
9. Colon- it absorbs water from undigested food.
10. Rectum- Stores undigested food and forms its pellets.
11. Anus- Egestion of undigested food.





ARTERIAL SYSTEM OF RAT

1. It consists of heart & arteries supplying blood to each and every part of the
body.
2. It consists of anterior and posterior arterial system.
3. Anterior arterial system is m...de up of pulmonary trunk & systemic aorta or
aortic trunk.
4. Pulmonary trunk arises from right ventricle& supplies deoxygenated blood to
lungs for oxygenation.
5. Aortic trunk arises from the left ventricle & gives three main branches to
neck, head & fore limbs.
6. Systemic arch extend backward pierces diaphragm and forms dorsal aorta &
supplies to various posterior organs and systems.
7. The arteries named according to organs, it supplies the blood. e.g. Hepatic,
renal, gastric, rectal etc.


VENOUS SYSTEM OF RAT

 
MALE REPRODUCTIVE SYSTEM OF RAT

1. Male reproductive system consists of pair of testes, pair of epididymis, pair of
vasa deferentia, pair of seminal vesicles, associated glands, urethra and penis.
2. Testes produce sperms, vasa deferentia convey them from epididymis to
seminal vesicles that secrete major part of semen, and associated glands
activate the sperms.
3. While penis acts as intermittent organ to transfer the sperm during coitus.
4. In male the genital and excretory product use common path for some distance
& internally connected so it is called urino-genital system.



FEMALE REPRODUCTIVE SYSTEM OF RAT