Spleen

Question 1

Spleen is _____ organ

Answer 1

Largest Lymphoid

Question 2

Functions of Spleen

Answer 2

1. Remove worn out RBCs and Microbial Agents
2. Manufacture RBCs in fetal life and Lymphocyes after birth
3. Produces IgM by Plasma Cells
4. Stores RBCs and releases when required

Question 3

Where is spleen located

Answer 3

It is located in the left Hypochondrium between fundus of stomach and diaphragm, behind the 9th 10th and 11th Ribs

Question 4

Shape and Color of Spleen

Answer 4

Wedge Shaped and Purple In Color

Question 5

The long axis of spleen corresponds to the long axis of

Answer 5

10th Rib

Question 6

The medial end lies ____-

Answer 6

5cms away from the midline of back at the level of T10

Question 7

The external features of Spleen are

Answer 7

1. 2 Ends ( Anterior and Posterior )
2. 3 Borders ( Superior, Inferior and Intermediate )
3. 2 Surfaces ( Diaphragmatic and Visceral )

Question 8

The Anterior End is

Answer 8

Lower pole/Lateral End is broad and is more like a border. It is directed downwards forwards and in the left. It is related to left colic flexure

Question 9

The posterior End is

Answer 9

Medial/Upper Pole which is blunt and rounded, projected upwards and backwards and medially towards vertebral column. Related to upper pole of kidney

Question 10

The Superior Border

Answer 10

It is thin and convex. It separates the visceral ( gastric impression ) surface from diaphragmatic surface. It has characteristic notches present near its anterior end

Question 11

The Inferior Border

Answer 11

It separates the visceral ( Renal Impression ) surface from diaphragmatic surface. It is rounded and corresponds to the lower border of 11th rib

Question 12

Intermediate Border

Answer 12

It is rounded and separates the gastric impression from renal impression on the visceral surface.

Question 13

Diaphragmatic Surface

Answer 13

It is smooth convex and is directed upwards and backwards and to the left.

Question 14

Visceral Surface and its impressions

Answer 14

It is concave and irregular. It has 4 impressions

1. Gastric Impression
2. Renal Impression
3. Colic Impression
4. Pancreatic Impression

Question 15

Arterial Supply of Spleen

Answer 15

Splenic Artery, the largest branch of colic artery which transverses thru the lienorenal ligament to reach near hilum and divides into 5 or more branches which enter the spleen

Question 16

Venous Drainage of Spleen

Answer 16

Blood is drained into Splenic vein formed at the hilum by the union of 5 or more tributaries and which further drained into superior mesentric vein to form portal vein.

Question 17

Lymphatic Drainage

Answer 17

No proper lymphatics, the tissue fluid drains in venous sinusoids which drain thru splenic vessels into Pancreaticolineal lymph nodes

Question 18

Nervous Supply

Answer 18

Supplied by Sympathetic Fibres of coliac plexus. They supply blood vessels (vasomotor) and smooth muscle fibres present in the trabeculae and capsule

Question 19

Segments of spleen

Answer 19

The spleen presents two segments, superior
and inferior, separated by an avascular plane passing
perpendicular to the long axis of the spleen