Chapter 3 Form 3 Science

* The process of exchange of substances needed by cells and waste products occurs at suitable rate and comprehensively.

*Have no specialised transport system.

These are the characteristics of:

• Complex organism

• Simple organism

• Complicated organism

• Singular organism

Tick the CORRECT Importance of The Function of Transport System in Organisms.

• Transport substances needed by cells such as oxygen and nutrients to produce energy through cellular respiration.

• Eliminates toxic waste products from the cells such as carbon dioxide and urea.

• Transport substances needed by plant cells such as carbon dioxide and water to carry out photosynthesis.

• Transport the products of photosynthesis such as sucrose and carbon dioxide from the leaves to the other parts of the plants.

Type of blood circulatory system in fish is:

• Double blood circulatory system

• Incomplete double circulatory system

• Complete double circulatory system

• Single blood circulatory system

Which shows the correct pathway of oxygenated blood entering and leaving the heart?

• Pulmonary vein > left atrium > left ventricle > aorta

• Pulmonary vein > left atrium > right ventricle > aorta

• Vena cava > right atrium > right ventricle > pulmonary artery

• Vena cava > right atrium > left ventricle > pulmonary artery

Which shows the correct pathway of deoxygenated blood entering and leaving the heart?

• Vena cava > right atrium > right ventricle > pulmonary artery

• Vena cava > right atrium > left ventricle > pulmonary artery

• Vena cava > right atrium > right ventricle > pulmonary vein

• Vena cava > left atrium > left ventricle > pulmonary artery

What is the function of valves in heart?

• To prevent the backflow of blood in the chambers.

• To allow the backflow of blood in the heart.

• To initiate the flow of the blood in the heart.

Which blood vessels carry blood with oxygen and nutrients away from the heart to the cells?

• stomach

• arteries

• veins

• capillaries

Which vessel mainly transport deoxygenated blood?

• Artery

• Aorta

• Capillary

• Vein

Which of the following has walls that are one cell thick and is a site for diffusion?

• Vein

• Artery

• Capillary

• Aorta

Identify the part labelled C.

• Left atrium

• Left ventricle

• Right atrium

• Right ventricle