Blood Flashcards
1
Q
What do red blood cells do?
A
Carry Oxygen
2
Q
What is the shape of a red blood cell?
A
A biconcave disc, this gives them a large surface area for absorbing oxygen.
3
Q
Why don’t red blood cells have a nucleus?
A
To give more room in the cell to carry oxygen
4
Q
What do white blood cells do?
A
Defend against infection
5
Q
Do white blood cells have a nucleus?
A
Yes
6
Q
What are two techniques used by white blood cells to defend the body?
A
engulfing unwelcome microorganisms
producing antibodies and antitoxins
7
Q
What do platelets do?
A
Help blood clotting at a wound
8
Q
What can a lack of platelets do?
A
Cause excessive bleeding and bruising
9
Q
What is plasma?
A
The liquid that carries everything in the blood
