Spleen Flashcards
Where is the spleen located in the body
In the left hypochondrium
Convex surface resting on diaphragm
visceral surface in contact with the stomach and left kidney
Normal weight of the spleen
150 g to 250 g
What is the length of the spleen
5 cm to 13 cm
What is an accessory spleen
Small nodule of splenic tissue found apart from the main body of the spleen
Percentage of population with accessory spleen
10%
When is the spleen palpable
When size over 14 cm
From where does the blood enter spleen
From the splenic artery which divides into the trabecular arteries and give rise to Central arterioles
Why is arterioles ends in the spleen unique
Because they form cords which lack endothelial lining which creates an open blood system with lose reticular connective tissue network lined by fibroblasts and macrophages
How is blood drawn from the spleen
Enters venous sinuses which goes into splenic vein and get back to general circulation
Percentage of red pulp in spleen
75%
What forms the red pulp
The cords and sinuses
What is the function of the Red pulp
Monitoring integrity of red blood cells
What is the white pulp
Lymphatic tissue surrounding central arterioles
What is the periarteriolar lymphoid sheath
It’s a Sheath that is found around the central material which contains T cells
Immune cells found in the white pulp
B cells
Which zones are rich in macrophages and dendritic cells
The marginal and the perifollicular zones
How fast is rapid blood circulation in the spleen
1 or 2 minutes