Portal Circulation

Question 1

Portal circulation

Answer 1

Circulations which begins and ends by capillaries (arterial blood which leaves heart has to pass through 2 capillary networks before returning to heart)

Question 2

Networks

Answer 2

1st network and 2nd network

Question 3

1st network

Answer 3

Lies in alimentary canal submucosa

Question 4

2nd network

Answer 4

Forms sinusoidal capillary network between liver cells columns

Question 5

It carries venous blood from four sites

Answer 5

1. Digestive tract: (from esophagus lower end to anal canal upper 1/2)
2. Spleen
3. Pancreas
4. Gall bladder

Question 6

Venous blood course

Answer 6

1. Blood passes through portal vein to liver where metabolism occurs
2. Portal blood circulates in liver sinusoids
3. Passes to central veins which are collected in hepatic veins terminating in IVC

Question 7

Portal vein formation

Answer 7

Formed by portal vein and its tributaries

Question 8

Systemic vein formation

Answer 8

Formed by IVC and SVC and their tributaries

Question 9

Portal vein start

Answer 9

Tributaries

Question 10

Portal vein end

Answer 10

Branches

Question 11

Systemic vein start

Answer 11

Tributaries

Question 12

Systemic vein end

Answer 12

Large vein

Question 13

Portal vein sets of capillaries

Answer 13

2

Question 14

Systemic vein sets of capillaries

Answer 14

1

Question 15

Portal vein valves

Answer 15

No valves

Question 16

Systemic vein valves

Answer 16

May contain valves

Question 17

Portal vein blood

Answer 17

1. Blood inside contains absorbed digested food (glucose and amino acids)
2. Incompletely deoxygenated blood

Question 18

Systemic vein blood

Answer 18

1. Blood inside contains metabolism products from different organs
2. Completely digested food

Question 19

Portal vein pressure

Answer 19

Pressure inside is higher

Question 20

Systemic vein pressure

Answer 20

Pressure inside is lower