Which Is Incorrect About the Fish Heart

question 39

Multiple Choice

Which is incorrect about the fish heart?

• A)Blood returns to the heart through veins.
• B)The heartbeat sequence in the fish is maintained in vertebrates that evolved later.
• C)It is a 3-chambered heart shaped like a tube.
• D)The electrical impulse that produces the contraction is initiated in the sinus venosus.
• E)It pumps fully oxygenated blood to the body that has passed over the gills.

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