The circulatory system of cephalopods is more efficient than that of other molluscs because
A)it places the systemic circulation before the gills.
B)it is a closed network of vessels.
C)all blood is circulated through the gill filaments.
D)accessory or brachial hearts increase blood pressure before blood flows through the gills.
E)All of the choices are correct

Question

Quizplus · Accepted Answer

Cephalopods have a more efficient circulatory system than other molluscs due to a combination of factors: their system is closed, allowing for more efficient transport of oxygen and nutrients; they have accessory or brachial hearts that boost blood pressure, enhancing oxygen uptake at the gills; and their circulatory design ensures all blood passes through the gill filaments for gas exchange, optimizing oxygenation.

The Circulatory System of Cephalopods Is More Efficient Than That