Chpt 8 The Circulatory System

Question 1

What is the human transport system?

Answer 1

The circulatory system

Question 2

What does the circulatory system consist of?

Answer 2

Blood, blood vessels and the heart

Question 3

What is blood?

Answer 3

Its a liquid that carries substances ro and from cells. It travels in arteries, veins and capillaries

Question 4

What are the functions of blood?

Answer 4

1) transport: it carries oxygen,digested food, waste materials and hormones
2) defence against disease: it destroys harmful bacteria and viruses. It also clots when we cut ourselves to stop bleeding
3) it keeps our body temp at 37 degrees. A chemical reaction in cells produces heat energy and the blood carries it around the body

Question 5

What is blood made of?

Answer 5

Plasma, red blood cells, white blood cells and platelets

Question 6

What is plasma?

Answer 6

Its a straw coloured liquid made of water and dissolved substances. The blood cells float in it

Question 7

What are the functions of the plasma?

Answer 7

• To transport dissolved substances like glucose and gases (CO2) its also carries waste (urea) and hormones (insulin)
• to carry heat around the body

Question 8

What is haemoglobin?

Answer 8

Its a red pigment found in cells. It transports oxygen