The Circulatory system

Question 1

properties of a red blood cell

Answer 1

• carries oxygen from the lungs to the blood
• have no nucleus which creates more room for oxygen
• their shape is a biconcave shape for more surface area
• In the lungs, oxygen binds to haemoglobin ( red pigment) to form oxyhaemoglobin. this then splits in the body tissues to release oxygen to cells

Question 2

properties of white blood cells

Answer 2

• some can change shape to gobble up unwanted microorganisms- phagocytosis
• some produce antibodies to fight microorganisms and antitoxins to eat up the toxins produced
• has a nucleus

Question 3

properties of platelets

Answer 3

• no nucleus
• help to clot a wound
• lack of platelets cause excessive bleeding and bruising

Question 4

properties of plasma

Answer 4

• contains glucose and amino acids
• carries red blood cells, white blood cells, and platelets
• co2
• urea
• hormones
• protein