Cardiovascular System

Question 1

Functions of Blood

Answer 1

• removes waste products from organs and tissue
• regulates body temp by distributing
• clotting prevents a loss of blood cells and body fluids
• acts as a vehicle (for taking hormones to organs or tissues)
• aids in the defence against the invasions of micro-organisms
• transportation of nutrients
• transport respiratory gases (such as oxygen)

Question 2

Steps in formation of the blood clot

Answer 2

1) vascular - rapid constriction of the vessel to decrease and flow
2) Platelet - clumps together to adhere to injure vessels and form a plug
3) Coagulation factors are released, a blood clot is formed and seals off damaged portion
4) Clot retraction - bleeding stopped, clot retracts and brings torn edges closer together
5) Fibrinolysis - final repair of injured vessel, clot breaks up and cells carry out further repair

Question 3

Colour of plasma

Answer 3

Yellowish

Question 4

Components of plasma

Answer 4

• nutrients
• nitrogen
• sugar
• salts
• proteins
• gases
• hormones

Question 5

Functions of proteins

Answer 5

• Clotting
• Transport
• Maintain blood volume/pressure
• pH

Question 6

WBC alternate names

Answer 6

Leukocytes

Question 7

WBC ratio to RBC

Answer 7

1:600

Question 8

Where are WBC and RBC produced?

Answer 8

bone marrow

Question 9

Functions of WBC

Answer 9

Essential for protection against illnesses and disease, destroy harmful substances and bacteria