Blood, Vessels And Heart Flashcards
What colour is plasma?
Yellow
Where is urea produced?
In the liver
What does plasma carry?
Red blood cells, White blood cells and platelets.
What pigment do red blood cells have that binds to oxygen?
Haemoglobin
Are white blood cells bigger or smaller than red blood cells?
Biggger
What has a nucleus, red blood cells or white blood cells?
White blood cells
What’s the main function of white blood cells?
To form part of the body’s defence system against harmful organisms.
Do platelets have a nucleus?
No
Why are platelets extremely important?
They help blood clotting to stop continuous bleeding at the site of the wound.
The arteries _______ as blood runs through.
Stretch
The arteries have the thickest/thinnest walls of all blood vessels.
Thickest
The arteries have large/small lumen.
Small
The arteries have a thick/thin layer of muscle and elastic fibres.
Thick
Where do the arteries carry blood from and to?
From the heart to other organs.
Do arteries carry oxygenated or deoxygenated blood?
Oxygenated
Veins carry blood…
Away from the organs and towards the heart
Veins have ______ that no other vessel does.
Valves
Veins have a small/large lumen.
Large
Veins have relatively thin/thick walls.
Thin
Veins carry oxygenated/deoxygenated blood.
Deoxygenated blood
Veins have/don’t have a pulse.
They don’t have a pulse.
If the blood begins to flow backwards in the veins…
The valves close to prevent a back-flow of blood.
Capillary walls are how thick?
One cell
A capillary lumen is…
Narrow
The capillaries link the…
Arteries and veins
What do capillaries enable substances to perform?
For substances to diffuse out of the blood and into the cells.
