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Questions and Answers
The heart in humans, other mammals, and birds is divided into how many chambers?
The heart in humans, other mammals, and birds is divided into how many chambers?
Four chambers - upper left and right atria and lower left and right ventricles.
What prevents backflow of blood in a healthy heart?
What prevents backflow of blood in a healthy heart?
Heart valves prevent backflow of blood.
In which node are the pacemaker cells responsible for the rhythm of the heart located?
In which node are the pacemaker cells responsible for the rhythm of the heart located?
The pacemaker cells are located in the sinoatrial node.
What are the three layers that make up the wall of the heart?
What are the three layers that make up the wall of the heart?
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What is the theory behind the asymmetric orientation of the heart in all vertebrates?
What is the theory behind the asymmetric orientation of the heart in all vertebrates?
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