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Circulatory System Learning Objectives

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Questions and Answers

What is the primary function of the mammalian heart?

Receiving oxygen-poor blood from the body

Pumping oxygen-rich blood to the lungs for oxygenation

Pumping oxygen-rich blood to the body (correct)

Receiving oxygen-poor blood from the lungs

In which type of circulation are multiple chambers connected in series and guarded by valves?

Coronary circulation

Systemic circulation (correct)

Pulmonary circulation

Cardiac circulation

How many complete chambers does the mammalian heart have?

Two atria and two ventricles (correct)

Three atria and two ventricles

Two atria and one ventricle

One atrium and one ventricle

Which chamber of the heart receives oxygen-poor blood returning from the head and body?

Right atrium Signup and view all the answers

What is the function of valves in the circulatory system?

Ensure unidirectional blood flow Signup and view all the answers

Which type of animal has a heart with incomplete chambers?

Reptiles Signup and view all the answers

Which chamber of the mammalian heart receives blood from the left atrium and pumps it to the aorta for systemic circulation?

Left ventricle Signup and view all the answers

What structure ensures the unidirectional flow of blood in the mammalian heart?

Heart valves Signup and view all the answers

Which type of cells constitute the bulk of the heart wall in the mammalian heart?

Contractile cells Signup and view all the answers

What is the function of autorhythmic cells in the mammalian heart?

Generation of electrical impulses Signup and view all the answers

Where is the sinoatrial (SA) node located in the mammalian heart?

Right atrium Signup and view all the answers

Which layer of the mammalian heart forms a fluid-filled sac that surrounds the heart?

Pericardium Signup and view all the answers

What allows flow from ventricles into arteries during ventricular contraction in the mammalian heart?

Aortic and pulmonary valves Signup and view all the answers

What prevents backflow from atria into veins in the mammalian heart?

Atrial pressures higher than venous pressures Signup and view all the answers

Which chamber of the mammalian heart receives O2-rich blood from lungs via pulmonary veins?

Left atrium Signup and view all the answers

What structure allows flow from atria into ventricles during ventricular filling in the mammalian heart?