Biology- Blood Flashcards
1
Q
What is blood
A
A tissue made of a liquid called plasma
2
Q
What is in plasma
A
- red blood cells
-white blood cells - platelets
3
Q
What does plasma do
A
Transports various chemical substances around the body such as the products of digestion, hormones, antibodies, urea and carbon dioxide
4
Q
What are the main factors of red blood cells
A
-they contain haemoglobin
- they do not have a nucleus
-they are very small
- shaped like biconcave discs providing a large surface area for oxygen to quickly diffuse through
5
Q
What is haemoglobin
A
A substance that binds with oxygen to transport it from the lungs to the tissues and cells, where it is needed for respiration
6
Q
What are the main factors of white blood cells
A
- they are essential to protect the body against infection
- they can change shape, squeezing out of the blood vessels, into the tissues
-they engulf microorganisms and pathogens
7
Q
What are platelets
A
They are fragments of dead cells, that collect at wounds and trigger blood clotting
