Heart Functions and Structures

The primary function of the heart is to:

• pump blood throughout the body

• digest food

• filter waste from the blood

• control body temperature

Which major structures are involved in the transport of oxygen and nutrients to cells?

• Heart and lungs

• Arteries and veins

• Brain and spinal cord

• Stomach and intestines

The heart is composed of what type of tissue?

• Epithelial tissue

• Connective tissue

• Muscle tissue

• Nervous tissue

The role of arteries in the circulatory system is to:

• carry blood away from the heart

• carry blood towards the heart

• exchange gases with tissues

• store blood

Fill in the blank: The heart is the pump that moves blood through the ________.

• circulatory system

• digestive system

• nervous system

• respiratory system

True or False: Veins carry blood away from the heart.

• True

• False

The function of pacemaker cells in the heart is to:

• regulate the heart rate by generating electrical impulses

• pump blood throughout the body

• filter blood to remove waste products

• supply oxygen to the heart muscle

Fill in the blank: The right side of the heart takes in O2-poor blood from tissues and pumps it to the lungs via the ________ circuit.

• pulmonary

• systemic

• coronary

• lymphatic

The role of the sinoatrial (SA) node in the heart is to:

• pump blood throughout the body

• regulate the opening and closing of heart valves

• initiate and regulate the heartbeat

• transport oxygenated blood to the lungs

Fill in the blank: The septum divides the heart laterally into 2 sides with ________ chambers.

• 4

• 2

• 3

• 5