15 Questions
What is the approximate size of the human heart?
Size of a closed fist
How many chambers does the heart of a fish generally have?
Two
What encloses the human heart and contains a small amount of fluid?
Pericardium
What prevents backflow of blood in a healthy heart?
Heart valves
Where is the heart located in most animals?
Between the lungs, in the middle compartment of the chest
What is the primary function of the lungs in the respiratory system?
Extract oxygen from the air and transfer it into the bloodstream
What is the role of the pleurae in the respiratory system?
Reduce friction between the lungs and chest wall during breathing
How is respiration driven in mammals, reptiles, and birds?
By using different muscles to support and foster breathing
What mechanism was used for driving air into the lungs in earlier tetrapods?
Buccal pumping by the pharyngeal muscles
What is the main function of the lungs in the gas exchange process?
To extract oxygen from the air and transfer it into the bloodstream
What is the primary function of the lungs in the respiratory system?
Extract oxygen from the air and transfer it into the bloodstream
What is the role of the pleurae in the respiratory system?
Reduce friction between the lungs and chest wall during breathing
How is respiration driven in mammals, reptiles, and birds?
By different muscular systems
How was air driven into the lungs in earlier tetrapods?
Via buccal pumping by the pharyngeal muscles
Where are the lungs located in mammals and most vertebrates?
Near the backbone on either side of the heart
Test your knowledge about the human heart with this quiz! From its anatomy to its function in the circulatory system, challenge yourself with questions about this vital organ.
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