Cardiovascular - Class activity Form 5

All organisms need their cells to be fueled with ______ and ______ in order to function and live.

One or more correct responses

• Carbon dioxide

• Oxygen

• Food

• Pipes

The human body is made up of billions of cells and needs a complex transport system to do which of the following?

One or more answers

• Transport waste to respiring cells

• Supply the needs of the body cells

• Reduce the systems total surface area

• Transport waste away from the respiring cells

The human transport system (circulatory) has ___ major components.

• 2

• 3

• 4

• 5

The area where materials enter the tissues by moving through membranes are known as ?

• Mediums

• Blood vessels

• Sites of exchange

• Veins

Two key functions of the veins that distinguish them from the arteries are:

Veins ....

• Carry blood to the heart and have thicker walls

• Carry blood away from the heart and have thinner walls

• Carry blood to the heart and have a large lumen

• Carry blood away from the heart and have a small lumen

Arteries have ____ walls that contain muscle and ____ fibres.

• thick, elastic

• thin, elastic

• thick, rigid

• thin rigid

The pulse present in the arteries is due mainly to ?

• number of capillaries present

• Valves

• Pressure from the heart

• Cardiac output

________is located between the cells of the body and allows diffusion between the blood and cells to take place.

• valves

• tissue fluid

• the heart

• plasma

The blood is comprised of ___ main components.

• 3

• 4

• 5

• 6

Red blood cells are also called ?

• phagocytes

• lymphocytes

• erythrocytes

• mesophyte