Author: Anonymous

Which of the following is true about fishes’ circulatory system?

Which of the following is brought on by soft masses of fatty materials building up in arteries?

Which of the following is true of amphibians?

Arthropods and most mollusks have a closed circulatory system.

Which of these pumps blood throughout the body?

Which of the following is gas exchange between blood and tissue fliud?

The epiglottis is a flap of tissue that covers opening into the larynx as food is swallowed.

The pulmonary circuit circulates blood to and from lungs for gas exchange

The atrioventricular valves prevent backflow from atrium to ventricles.

Which of the following is known as the “pacemaker” and initiated by sending out an excitatory impulse to cause atria to contract.