Blood Flashcards
1
Q
What is blood made up of?
A
plasma, red blood cells, white blood cells and platelets
2
Q
What is plasma?
A
- pale yellow liquid found in blood
- made of water and allows blood to flow
- carries red and white blood cells
- carried food, minerals and hormones
3
Q
What are red blood cells?
A
- carry oxygen and deliver it to parts of the body
- one drop of blood contains 200 million red blood cells
4
Q
What are white blood cells?
A
- kill bacteria (germs) and other harmful substances
- attach themselves to bacteria, smothering it and eating it
5
Q
What are platelets?
A
- parts of cells that help stop bleeding
6
Q
What happens when your body is cut?
A
- platelets cause stringy fibers to form over the hole
- blood cells pile onto the fibres, forming a clot
7
Q
What is a scab?
A
a layer of mostly dried blood cells that keeps bacteria from entering the body
8
Q
How long does it take for blood to travel from your heart to big toe and back?
A
less than one minute
