Transport in Animals

The diagram shows a section through the heart. Which is mitral valve in the right side of the heart?

• A

• B

• C

• D

The diagram shows human blood cells as seen under microscope. What is the function of cell X?

• to carry carbon dioxide

• to phagocyte pathogens

• to produce antibodies

• to prevent the blood lot

Which chamber of the heart has the most muscular wall?

• left atrium

• right atrium

• left ventricle

• right ventricle

What is the advantage of a double circulatory system in mammals?

• Blood can flow down the body on the left and up the body on the right

• Blood can flow more slowly along the circulatory system

• Blood pressure stays the same throughout the circulatory system

• Oxygenated blood and deoxygenated blood are kept separate

Diagram shows a circulatory system. Which vessels carry oxygenated blood?

• 1 and 3

• 1 and 4

• 2 and 3

• 2 and 4

What happens to the heart valves when the ventricles contract?

• mitral valves close, semilunar valves close

• mitral valves close, semilunar valves open

• mitral valves open, semilunar valves close

• mitral valves open, semilunar valves open

What is the fluid in the blood called?

• lymph

• mucus

• plasma

• tissue fluid

In a drop of human blood, which of the cell is the most numerous?

• 
• 
• 
• 

The red color of the red blood cell is derived from the presence of

• Eosin

• Globulin

• Haemoglobulin

• Iron

Diagram shows human blood vessel. What will happen if structure X is not functioning?

• Blood flow increases

• Blood pressure increases

• Blood flows in one direction

• Blood flows backwards