BTEC Applied Science: Unit 5 B1 The Heart
BTEC Applied Science Help・2 minutes read
The heart is a powerful pump with four chambers that pumps blood throughout the body and lungs, facilitated by valves and a network of blood vessels, controlled by electrical impulses from nodes like the SAN and AV node, ultimately determining cardiac output in a healthy individual.
Insights
- The heart is a muscular pump with four chambers that work together to circulate blood throughout the body, with specific valves ensuring blood flows in the correct direction, forming a complex network of blood vessels branching out to various body parts.
- The heart's rhythm is controlled by the sinoatrial node (SAN) acting as a pacemaker, generating impulses for the heart to beat, with additional nodes and fibers coordinating the sequence of contractions, ultimately determining the cardiac output, which is the volume of blood pumped per minute, a key indicator of heart health.
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Recent questions
What is the main function of the heart?
The main function of the heart is to pump blood throughout the body.
How many chambers does the heart have?
The heart has four chambers: two atria and two ventricles.
What is the role of the valves in the heart?
Valves in the heart ensure that blood flows in the correct direction.
What is the purpose of the sinoatrial node?
The sinoatrial node acts as the pacemaker, producing impulses for the heart to beat.
How is cardiac output calculated?
Cardiac output is calculated by multiplying the number of beats per minute by the stroke volume.
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