10 Questions
What is the approximate size of the human heart?
The size of a closed fist
In humans, how many chambers is the heart divided into?
Four chambers
What prevents backflow of blood in a healthy heart?
Heart valves
What is the protective sac around the heart called?
Pericardium
Where is the sinoatrial node located?
Right atrium
What is the role of the heart in the circulatory system?
Carrying nutrients to the body
What is the function of the pericardium?
Enclosing and protecting the heart
What are the three layers that make up the wall of the heart?
Epicardium, myocardium, endocardium
What causes the asymmetric orientation of the heart in all vertebrates?
Developmental axial twist in the early embryo
What determines the rhythm of blood pumping by the heart?
Pacemaker cells in the sinoatrial node
Test your knowledge about the anatomy and function of the heart, the vital organ responsible for pumping blood throughout the body. Learn about its size, location, and the circulation of blood through its four chambers.
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