Blood Vessels

Question 1

What are the types of blood vessels

Answer 1

artery
capillary
vein

Question 2

describe a artery

Answer 2

-walls made of elastic tissue
-thick walls to withstand high pressure
-ellastic tissue in walls allowing them to stretch
-narrow lumen, maintain high blood pressure
-pulse may be detected

Question 3

what is the main artery

Answer 3

aorta

Question 4

why does the artery have thick walls and an elastic tissue

Answer 4

thick to withstand high pressure
elastic to allow walls to stretch

Question 5

The function of an artery

Answer 5

to carry oxygenated blood away from the heart (at a high pressure)

Question 6

Describe a capillary

Answer 6

-walls are only one cell thick (reducing diffusion distance)
-gaps occur between the cells making up the capillary wall called pores

Question 7

Why are the walls in a capillary one cell thick

Answer 7

to reduce diffusion distance

Question 8

the function of capillary

Answer 8

-to exchange nutrients (glucose and oxygen from plasma to cells)
-to exchange waste products (carbon dioxide from cells to plasma)

Question 9

describe a vein

Answer 9

-walls are made of elastic tissue and muscle
-thin walls as blood pressures low
-valves present- make sure blood flows in 1 direction (towards the heart)
-wide lumen (reduce resistance between the blood and walls of vein)

Question 10

whats the main vein

Answer 10

vena cava

Question 11

function of vein

Answer 11

it carries
-blood towards the heart
-deoxygenated blood
-blood at low pressure