Circulatory System - Science 30 Unit A

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Questions and Answers

Which chamber of the heart receives deoxygenated blood from the body?

Right atrium (correct)

Right ventricle

Left ventricle

Left atrium

What is the function of the pulmonary arteries?

Carry oxygenated blood from the heart to the lungs

Carry deoxygenated blood from the lungs to the heart

Carry deoxygenated blood from the heart to the lungs (correct)

Carry oxygenated blood from the lungs to the heart

Which blood vessel carries oxygenated blood back to the heart from the lungs?

Pulmonary artery

Vena cava

Pulmonary vein (correct)

Aorta

What happens to the blood in the lungs?

It picks up oxygen and releases carbon dioxide. Signup and view all the answers

Which chamber of the heart pumps oxygenated blood to the rest of the body?

Left ventricle Signup and view all the answers

What is the primary function of coronary arteries?

Deliver oxygen-rich blood to the heart muscle Signup and view all the answers

Which part of the heart is responsible for receiving blood?

Atria Signup and view all the answers

What separates the right and left sides of the heart?

Septum Signup and view all the answers

Which vessels are primarily involved in transporting blood back to the heart from the body?

Vena cavae Signup and view all the answers

Which chambers of the heart are considered discharging chambers?

Ventricles Signup and view all the answers

What are the two primary loops of the circulatory system?

Pulmonary and systemic circulation Signup and view all the answers

What is the main function of the pulmonary circulation?

Exchange oxygen and carbon dioxide at the lungs Signup and view all the answers

Which substance is primarily removed from blood during its passage through the lungs?

Carbon dioxide Signup and view all the answers

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

Pump and transport blood Signup and view all the answers

Which blood vessels are primarily associated with delivering oxygen to the body?

Aorta Signup and view all the answers

What characteristic of the heart contributes to the rhythmic contraction required for effective blood circulation?

Electrical conduction system Signup and view all the answers

How does the heart contribute to the immune defense of the body?

By transporting immune cells through the bloodstream Signup and view all the answers

Which part of the circulatory system is involved in delivering nutrients to tissues?

Systemic circulation Signup and view all the answers

What is the correct order of events during the cardiac cycle?

Ventricles relax and expand, blood flows in from the atria contracting - Diastole - Ventricles contract, pressure increases - Blood is pumped out of the aorta or pulmonary artery Signup and view all the answers

Which of the following best describes the function of the pacemaker?

The pacemaker regulates the rhythm and speed of the heart beat. Signup and view all the answers

What is the primary function of the pulmonary artery?

To carry deoxygenated blood from the right ventricle to the lungs. Signup and view all the answers

Which of the following is NOT a characteristic of diastole?

The 'lub' sound is produced. Signup and view all the answers

What is the main function of the valves in the heart?

To regulate the flow of blood through the chambers. Signup and view all the answers

Which of the following statements correctly describes the relationship between the right ventricle and the pulmonary artery?

The right ventricle pumps deoxygenated blood to the pulmonary artery, which carries it to the lungs. Signup and view all the answers

What is the primary function of the left ventricle?

To pump oxygenated blood to the rest of the body. Signup and view all the answers

A defective pacemaker can lead to which of the following?

An irregular or stopped heartbeat. Signup and view all the answers

Study Notes

Living Systems Respond to Their Environment - Science 30 Unit A

The circulatory system, also known as the cardiovascular system, is composed of the heart, blood vessels, and blood.
The heart's function is to rhythmically contract, facilitating blood flow through pulmonary and systemic pathways.
The circulatory system is a vast network of blood vessels (tubes) and a pump (the heart)
Four key functions of the circulatory system include transport of oxygen and nutrients, transport of hormones, distribution of body heat, and defense against disease.
The lungs deliver oxygen to the blood and remove carbon dioxide.
The heart pumps blood to all areas of the body.
The circulatory system is composed of two closed loops: pulmonary and systemic.
Pulmonary circulation moves blood between the heart and lungs, picking up oxygen and releasing carbon dioxide.
Systemic circulation moves blood between the heart and the rest of the body, delivering oxygen and removing carbon dioxide.
Coronary circulation is the blood flow within the blood vessels of the heart muscles.
Oxygen-rich blood to the heart is carried by coronary arteries.
Deoxygenated blood from the heart muscle is carried away by cardiac veins.
The heart is located above the diaphragm and between the lungs, in the center of the chest.
The heart is composed of two parallel pumps, separated by the septum.
The right side of the heart pumps blood to the lungs.
The left side of the heart pumps blood to the body.
The heart has four chambers: two atria (receiving) and two ventricles (discharging).
One-way valves connect the atria and ventricles, controlling blood flow.
Arteries carry blood away from the heart.
The aorta carries blood to the body.
Pulmonary arteries carry blood to the lungs.
Veins carry blood towards the heart.
The vena cava carries blood from the body to the heart.
Pulmonary veins carry blood from the lungs to the heart.
The heart beat is due to the pacemaker in the right atrium.
A defective pacemaker can cause irregular or stopped heartbeats.
The cardiac cycle is one complete heart beat.
Diastole is the relaxation and filling of the ventricles with blood from the atria.
Systole is the contraction and pumping of blood from the ventricles through the aorta and pulmonary artery.
The "lub dub" sounds are from the closing of heart valves.

Blood Flow Through the Heart

Deoxygenated blood returns to the heart through the vena cava.
This blood flows into the right atrium.
The right atrium contracts, pushing blood into the right ventricle.
The right ventricle contracts, pushing blood through the pulmonary artery to the lungs.
In the lungs, blood releases carbon dioxide and picks up oxygen.
Oxygenated blood returns to the heart through the pulmonary veins.
This blood enters the left atrium.
The left atrium contracts, pushing blood into the left ventricle.
The left ventricle contracts, forcing blood through the aorta to the rest of the body.

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Description

Explore the intricacies of the circulatory system in this quiz based on Science 30 Unit A. Understand the functions of the heart, blood vessels, and how they interact with the lungs. Test your knowledge about the transport of nutrients, hormones, and the overall significance of this vital system.