How to identify the 4 major blood vessels in the dissection of alimentary canal of a rat ?

LEUNG KWOK KWONG

HK & KLN CCPA MA CHUNG SUM SECONDARY SCHOOL

To identify the blood vessels, you can perform some important steps first as follows.

Liver

Spleen

caecumileum

Step 1 Step 6

Step 2 Step 7

Step 3 Step 8

Step 4 Step 9

Step 5 Step 10

Main steps to identify the 4 blood vessels

Step 1

Move stomach on the right hand side of a rat

To cut mesentry connected between liver and stomach

Step 2

Put caecum on the right foot of a rat

Stomach pancreas

Step 3

To release the loop between ileum & colon

colon

Ileum

You can find that Ileum is crossing the colon here.

Step 4

Pink color pancreas is clearly found

Step 5

To show hepatic portal vein connecting from ileum to liver

To peel off some pancreas.

Step 6

Trace the duodenum & ileum as a fan-like pattern

Step 7

To identify the 3 major blood vessels on the position first

Coeliac artery

Anterior mesenteric artery

Hepatic portal vein

Step 8

To clear & pin out the 3 major blood vessels

Coeliac artery

Anterior mesenteric artery

Hepatic portal vein

Step 9

To find the posterior mesenteric artery near rectum

rectum

Posterior mesenteric artery

Step 10

Coeliac artery

Anterior mesenteric artery

Hepatic portal vein

Posterior mesenteric artery

You are now finishing this dissection .

THANK YOU !LEUNG KWOK KWONG

HK & KLN CCPA MA CHUNG SUM SECONDARY SCHOOL