12 Questions
What is the primary difference between the double circulation in birds and mammals compared to other vertebrates?
The heart has two atria and two completely divided ventricles
What is the main reason why birds and mammals need a more efficient circulatory system?
They are endotherms and use more energy than ectotherms
What is the term for the independent evolution of similar traits in different ancestors?
Convergent evolution
How much more energy do birds and mammals use compared to equal-sized ectotherms?
Ten times as much
What is the advantage of having separate and independently powered systemic and pulmonary circuits?
Large traffic of substances
Why can't birds and mammals vary blood flow to the lungs without varying blood flow throughout the body?
Because their circulatory systems are linked
What is the function of the left side of the heart in birds and mammals?
Receives and pumps oxygen-rich blood
How do the circulatory systems of birds and mammals adapt to their high energy needs?
By having separate and independently powered systemic and pulmonary circuits
What is a key feature of the heart in birds and mammals?
Two atria and two completely divided ventricles
Why is a powerful four-chambered heart beneficial for birds and mammals?
It allows for more efficient oxygenation of the body
What is similar between the circulatory systems of birds and mammals?
Their double circulation pattern
What is the result of convergent evolution in birds and mammals?
Development of a powerful four-chambered heart
Learn about the unique double circulation system in birds and mammals, which differs from other vertebrates. Understand how the heart pumps oxygen-rich and oxygen-poor blood in these animals.
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