5 Questions
How many chambers does the heart of a fish typically have?
Two
What is the protective sac enclosing the heart called?
Pericardium
What determines the rhythm of the heart's blood-pumping action?
Pacemaker cells in the sinoatrial node
Where is the human heart located within the body?
Between the lungs, in the middle compartment of the chest
What causes an asymmetric orientation of the heart in all vertebrates?
Developmental axial twist in the early embryo
Test your knowledge about the human heart and circulatory system with this quiz. Learn about the structure and function of the heart, as well as its role in the circulatory system.
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