3.02 The Heart

What is the primary function of the heart?

• To store emotions

• To maintain pressure in the circulatory system

• To filter blood

• To produce hormones

What is the average heart rate of a human?

• 100 beats per minute

• 60 beats per minute

• 120 beats per minute

• 50 beats per minute

The heart actually lies within the mediastinum which is....??

What fluid helps to reduce friction around the heart?

• Blood

• Lymph

• Synovial

• Pericardial

Fluid flows from areas of ______ pressure to areas of _____ pressure.

• low, high

• medium, high

• high, low

• high, higher

Which part of the heart is responsible for pumping blood out?

• Atria

• Septum

• Ventricles

• Valves

What type of blood vessel carries blood away from the heart?

• Arteries

• Veins

• Capillaries

• Vena Cava

What type of blood is carried by the pulmonary arteries?

• Oxygen-rich blood

• Oxygen-poor blood

• Nutrient-rich blood

• Carbon dioxide-rich blood

Which valves close first during the first heartbeat cycle?

• Aortic and pulmonary semilunar valves

• Pulmonary and systemic valves

• Bicuspid and aortic valves

• Mitral and tricuspid valves

What happens during diastole?

• The heart relaxes

• The heart contracts

• Blood is pumped out

• Blood fills the atria