Cardio Vascular System Lesson 3

Question 1

Composition of blood

Answer 1

Plasma 55%
White blood cells 2%
Platelets 2%
Red blood cells 41%

Question 2

Plasma

Answer 2

90% made up of water also contains salts glucose and fatty acids , proteins, waste , enzymes,hormones and gases such as oxygen and carbon dioxide

Question 3

White blood cells

Answer 3

Also called leukocytes
Protect body from bacteria, viruses, and foreign bodies

Question 4

Platelets

Answer 4

Also called thrombocytes help to clot the blood and prevent blood loss

Question 5

Red blood cells

Answer 5

Also called erythrocytes they contain a protein called haemoglobin and this carries oxygen and carbon dioxide

Oxyhaemoglobin

Carbaminohaemoglobin

Question 6

Five functions of blood

Answer 6

Delivery of oxygen and nutrients

Removal of waste products ( co2 and lactate)

Thermoregulation

Fight infection

Clot blood