Circulatory System - BLOOD

Question 1

What are the three functions of blood in the circulatory system?

Answer 1

• transportation of gases, fuels and minerals
• protecting against infection and dehydration
• maintaining equilibrium (homeostasis) via enzyme and hormone regulation

Question 2

What are the 4 components of blood and what is their role?

Answer 2

• plasma: carries nutrients
• red blood cells: carry oxygen to body tissue and muscles
• White blood cells: fight infection
• platelets: help form blood clots to stop bleeding

Question 3

How much blood do adults have?

Answer 3

About 5.5 litres