MUST KNOW - Circulatory System

Question 1

What are the 3 key components of the circulatory system?

Answer 1

Blood, blood vessels, the heart

Question 2

Explain the composition of blood.

Answer 2

Plasma - 55% = mostly made of water, largest component
Thrombocytes (platelets) = assist with blood clotting
Leucocytes = A/Granulocytes, each play important function within the immune system.
Erythrocytes = no nucleus, transport oxygen from the lungs and carbon dioxide to the lungs.

Question 3

What are the 3 layers of blood?

Answer 3

Top layer = plasma
Buffy coat layer = thrombocytes, leucocytes
Bottom layer = erythrocytes

Question 4

What is the role of the arteries?

Answer 4

Carry oxygenated blood away from the heart

Question 5

What is the role of the veins?

Answer 5

Carry deoxygenated blood toward The heart.

Question 6

What is the role of the capillaries?

Answer 6

Link arteries to the veins, carry oxygenated and deoxygenated blood.