Blood
What are the three main components of blood?
Red blood cells, White blood cells & plasma
In which direction does the artery carry blood? (To or away from the heart?)
Away from heart
What is the function of capillaries?
To allow for the exchange of nutrients and gases between arteries, veins and cells.
What type of blood is carried in veins?
oxygenated
What do red blood cells carry away from the heart?
oxygenated blood (O2)
Does arteries carry oxygenated or deoxygenated blood?
Oxygenated
Do capillaries have valves?
No
Do veins have high or low pressure?
Low pressure
What do red blood cells carry to the heart?
deoxygenated blood (CO2)
Do arteries have high or low pressure?
High pressure
Do capillaries contain oxygenated or deoxygenated blood?
Both
How to veins prevent backflow of blood?
Valves
What is the role of white blood cells?
To fight off foreign substances such as bacteria or viruses
Do arteries have valves?
No
How many cells thick are capillaries?
One cell
What colour is the blood in your veins?
Red!!!
What are two things that make up blood plasma?
-Water
-Glucose
-Proteins
- salt
Describe the arteries:
1) Size of lumen
2) Size of wall
1) Narrow
2) Thick
Diffusion --> the tendency for something to move from high concentration to low concentration
Describe the veins:
1) Size of lumen
2) Size of wall
1) Wide
2) Thin