Circulatory System Quiz

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Questions and Answers

What is the primary function of the heart in the circulatory system?

To regulate body temperature

To filter toxins from the blood

To produce red blood cells

To pump blood throughout the body (correct)

Which part of the heart is responsible for supplying the heart muscle with oxygen and nutrients?

Coronary veins

Pulmonary arteries

Aorta

Coronary arteries (correct)

What are the walls of the heart primarily made of?

Connective tissue

Smooth muscle

Epithelial tissue

Cardiac muscle (correct)

What do coronary veins transport away from the heart muscle?

Carbon dioxide and waste Signup and view all the answers

Which component is NOT part of the circulatory system?

Nerves Signup and view all the answers

What is the function of the heart valves?

To prevent blood backflow Signup and view all the answers

Which term describes the phase where the ventricles contract and pump blood to the arteries?

Ventricular systole Signup and view all the answers

Which veins carry oxygenated blood back to the heart?

Pulmonary veins Signup and view all the answers

What is the primary role of capillaries in the circulatory system?

Facilitate exchange between blood and organs Signup and view all the answers

What occurs during the general diastole phase of the cardiac cycle?

The heart is filled with blood Signup and view all the answers

The term 'myocardium' refers to which part of the heart?

Muscle layer of the heart Signup and view all the answers

Which component of the heart prevents backflow of blood from the ventricles into the atria?

Tricuspid valve Signup and view all the answers

Which part of the ECG corresponds to auricular systole?

P wave Signup and view all the answers

Which of the following structures is part of the pulmonary circulation?

Pulmonary artery Signup and view all the answers

What characterizes the blood carried by the pulmonary artery?

Deoxygenated blood Signup and view all the answers

What is the primary delivery role of coronary arteries?

Deliver oxygenated blood to the heart muscle Signup and view all the answers

What type of blood vessel has thick walls and carries blood away from the heart?

Artery Signup and view all the answers

What happens during auricular systole?

Auricles contract to push blood into ventricles Signup and view all the answers

Study Notes

Circulatory System Objectives

Explain blood circulation
Recognize the structure of the heart
Recognize cardiac activity
Recognize cardiovascular disease

Parts of the Circulatory System

The circulatory system includes the heart, blood vessels, and blood.
Blood vessels consist of arteries, capillaries, and veins.
Blood is composed of plasma and blood cells.

Heart

The heart is a hollow muscular organ that pumps blood throughout the body.
The walls of the heart are made of cardiac muscle, known as myocardium.
Coronary arteries supply the heart with oxygen and nutrients.
Veins transport carbon dioxide and waste away from the heart.

Longitudinal Section of a Mammal's Heart

The heart contains structures like the superior vena cava, pulmonary artery, right and left atria, tricuspid valve, right ventricle, left ventricle, aortic valve, and pulmonary valve.

Cardiac Cycle

The cardiac cycle involves the rhythmic contraction and relaxation of the heart muscle.
The cycle includes phases like atrial systole (0.1 seconds), ventricular systole (0.3 seconds), and general diastole(0.4 seconds).
Atrial systole refers to the contraction of the atria, pushing blood into the ventricles.
Ventricular systole refers to the contraction of the ventricles, forcing blood out of the heart into the arteries
General diastole refers to the relaxation of the entire heart.

Heart Valves

Heart valves ensure one-way flow of blood.
Tricuspid, Bicuspid, and Sigmoid valves prevent backflow.
During different phases of the cardiac cycle, different valves open and close to ensure unidirectional blood flow.

Blood Circulation

Blood circulation is a closed system.
It involves pulmonary circulation, where blood circulates between the heart and lungs.
Systemic circulation, where blood circulates between the heart and the rest of the body.

Blood Vessels

Arteries carry oxygenated blood away from the heart.
Veins carry deoxygenated blood towards the heart.
Capillaries are thin-walled vessels for gas exchange between blood and tissues.
Arterioles and venules connect arteries and veins to capillaries, respectively.
Artery walls are thick, veins have thin walls and valves, capillaries have very thin walls.

Cardiovascular Accident (CVA)

It affects the heart's ability to supply blood to certain organs like the heart and brain.
Coronary arteries deliver oxygenated blood and nutrients to the heart muscle.

Myocardial Infarction (MI)

A cardiovascular accident, resulting from poor blood supply to the heart muscle.
Risk factors include diet rich in lipids and carbohydrates, obesity, stress, sedentary lifestyle, age, smoking, alcohol, and diabetes.
Diagnosis involves angiography, a medical imaging technique to visualize the insides of blood vessels.

Myocardial Infarction Treatment

Angioplasty is a technique used to mechanically widen narrowed or obstructed arteries.

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Description

Test your knowledge on the circulatory system with this quiz that covers blood circulation, heart structure, and cardiovascular diseases. You'll also explore the cardiac cycle and the anatomy of a mammal's heart. Get ready to dive into the world of circulatory dynamics!