arteries, veins, capillaries etc

Question 1

Venules

Answer 1

small vessels that collect blood from capillary beds and unite to form veins

Question 2

Shunt vessels

Answer 2

link an artery directly to a vein, bypassing capillaries.

function to control blood flow. In endotherms (warm blooded animals) the shunt vessels dilate in response to cold, thereby cutting off the blood flow to the extremities and preventing heat loss

Question 3

Arterioles

Answer 3

smaller muscular blood vessels that reduce pressure of blood before it enters capillaries. their size is regulated so important function in controlling blood pressure.

Question 4

Outer walls

Answer 4

A - thick
V - thin
C - One cell thick (very thin)

Question 5

Layers of elastic fibres

Answer 5

A - Thick
V -Thin
C - does not have any

Question 6

Lumen (space for blood flow)

Answer 6

A - Small
V - Large
C - Big enough for a single red blood cell (tiny)

Question 7

Contains valves?

Answer 7

A- No
V - Yes
C - No

Question 8

Type of blood carried

Answer 8

A - Oxygenated blood ( except pulmonary artery)
V - Deoxygenated blood ( except the pulmonary vein )
C - Both

Question 9

Direction of blood flow

Answer 9

A - away from the heart
V - to the heart
C - both

Question 10

Pulse?

Answer 10

A - Yes
V - No
C - No

Question 11

Pressure of blood carried?

Answer 11

A - High
V - Low
C - Low