9 Questions
What is the primary function of the right ventricle?
To pump blood to the lungs to pick up oxygen
What is the name of the valve that separates the right atrium and the right ventricle?
Tricuspid valve
Which of the following blood vessels carries oxygen-rich blood from the lungs to the heart?
Pulmonary veins
What is the name of the node that generates electrical impulses at a rate of 60-100 beats per minute?
Sinoatrial (SA) node
Which chamber of the heart receives deoxygenated blood from the body?
Right atrium
What is the main function of the heart in terms of blood flow?
To pump blood throughout the body
Which of the following is NOT a function of the heart?
Filtering blood
What is the name of the blood vessel that carries oxygen-rich blood from the heart to the rest of the body?
Aorta
Which of the following is a characteristic of the heart?
It is a muscular organ
Study Notes
Heart
Location and Structure
- Located in the thoracic cavity, between the lungs
- Protected by the rib cage
- Muscular organ, approximately the size of a fist
- Divided into four chambers:
- Right atrium (upper right)
- Right ventricle (lower right)
- Left atrium (upper left)
- Left ventricle (lower left)
Functions
- Pumps blood throughout the body
- Receives deoxygenated blood from the body and sends it to the lungs to pick up oxygen
- Receives oxygen-rich blood from the lungs and sends it to the rest of the body
- Regulates blood pressure and blood flow
Blood Flow
- Deoxygenated blood enters the right atrium through the superior and inferior vena cavae
- Blood flows from the right atrium to the right ventricle through the tricuspid valve
- Blood is pumped from the right ventricle to the lungs through the pulmonary artery
- Oxygen-rich blood returns to the heart through the pulmonary veins and enters the left atrium
- Blood flows from the left atrium to the left ventricle through the mitral valve
- Blood is pumped from the left ventricle to the rest of the body through the aorta
Heartbeat Regulation
- Controlled by the sinoatrial (SA) node, a group of cells in the right atrium
- SA node generates electrical impulses at a rate of 60-100 beats per minute
- Impulses travel through the atrioventricular (AV) node and then to the ventricles
- Ventricles contract and pump blood in response to the electrical impulses
Heart
Location and Structure
- Located in the thoracic cavity, between the lungs, protected by the rib cage
- A muscular organ, approximately the size of a fist
- Divided into four chambers: right atrium, right ventricle, left atrium, and left ventricle
Functions
- Pumps blood throughout the body
- Regulates blood pressure and blood flow
- Receives deoxygenated blood from the body and sends it to the lungs for oxygenation
- Receives oxygen-rich blood from the lungs and sends it to the rest of the body
Blood Flow
- Deoxygenated blood enters the heart through the superior and inferior vena cavae
- Blood flows from the right atrium to the right ventricle through the tricuspid valve
- Blood is pumped from the right ventricle to the lungs through the pulmonary artery
- Oxygen-rich blood returns to the heart through the pulmonary veins and enters the left atrium
- Blood flows from the left atrium to the left ventricle through the mitral valve
- Blood is pumped from the left ventricle to the rest of the body through the aorta
Heartbeat Regulation
- Controlled by the sinoatrial (SA) node, a group of cells in the right atrium
- SA node generates electrical impulses at a rate of 60-100 beats per minute
- Impulses travel through the atrioventricular (AV) node and then to the ventricles
- Ventricles contract and pump blood in response to the electrical impulses
Learn about the location, structure, and functions of the heart, including its chambers and role in circulation.
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