The diagram shows a blood circulatory system that contains of one ventricle and one atrium. Which vertebrate that has the circulatory system as mentioned above?

• 
• 
• 
• 

This vertebrate has double circulatory system which consists of pulmonary circulatory system and systemic circulatory system. The oxygenated blood and deoxygenated blood are separated and do not mix with each other in the heart.

Which vertebrate has this type or circulatory system? Tick the correct answers.

• 
• 
• 
• 
• 

The diagram shows a blood circulatory system that contains of one ventricle and two atria. Which vertebrate that has the circulatory system as mentioned above?

• 
• 
• 
• 
• 

How many chambers does a human heart have?

• Two chambers

• Three chambers

• Four chambers

• Five chambers

How many valves does a human heart have based on the diagram above?

• Two valves

• Three valves

• Four valves

• Five valves

SEMILUNAR VALVES are located at aorta and pulmonary artery. What is the function of semilunar valve?

• To ensure blood flow in one direction FROM LEFT ATRIUM TO LEFT VENTRICLE

• To ensure blood flow in one direction and DOES NOT FLOW BACK TO THE VENTRICLE

• To ensure blood flow in one direction FROM RIGHT ATRIUM TO RIGHT VENTRICLE

Tick TWO characteristics and functions of right atrium

• Has muscular wall

• Has thin muscular wall

• Receive oxygenated blood from lungs

• Receive deoxygenated blood from body cells

Why do ventricles have thicker muscular wall than atrium? Tick TWO correct answers

• Ventricles carry blood in higher pressure

• Blood in ventricles is forced to flow out from the heart

• Ventricles carry oxygenated blood

Which chamber of the heart has the thickest muscular wall?

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

This blood vessel carries deoxygenated blood from body cells to the heart.

Name the blood vessel as mentioned above.

• Pulmonary artery

• Pulmonary vein

• Vena cava

• Aorta