Blood

Cards (16)

What are the main components of blood?
Plasma, red blood cells, white blood cells, and platelets
What is the primary function of plasma in blood?
To transport useful substances and waste around the body
What type of molecules does plasma transport?
Digested food molecules and waste substances
What waste substances are transported by plasma?
Urea and carbon dioxide
What is the main function of red blood cells?
To transport oxygen to cells around the body
What molecule do red blood cells contain that holds oxygen?
Haemoglobin
Why do red blood cells have no nucleus?
To allow more room to carry oxygen
What shape do red blood cells have and why?
Concave disc shape, giving them a large surface area
What is the role of white blood cells?
To fight infections as part of the immune system
What feature do white blood cells have that red blood cells do not?
They have a nucleus
How do some white blood cells help fight infections?
By producing antibodies and engulfing pathogens
What do some white blood cells produce to neutralize toxins?
Antitoxins
What is the function of platelets in blood?
To help form blood clots at the site of a wound
What allows platelets to stick together?
Proteins that cover them
Where do platelets stick to help with clotting?
To damaged areas of blood vessels
Do platelets have a nucleus?
No