Applied Biology 27.3

Multiple Choice

In a closed circulatory system, blood

• flows through vessels that empty into a system of sinuses

• comes into direct contact with body tissues

• can be pumped under relatively low pressure

• circulates entirely within blood vessels

Multiple Choice

A single-loop circulatory system

• is found in most vertebrates that use lungs for respiration

• pumps blood around the body in one direction

• pumps oxygen-poor blood out of the heart to the lungs

• pumps oxygen-poor blood from teh gills to the rest of the body

Multiple Choice

All vertebrates have what type of circulatory system?

• closed circulatory system

• single-loop circulatory system

• open circulatory system

• double-loop circculatory system

Multiple Choice

What is one difference between the mammalian and the amphibian heart?

• mammals have a 2 chambered heart & amphibians have a 3 chambered heart

• mammals have a 3 chambered heart & amphibians have a 2 chambered heart

• mammals have a 4 chambered heart & amphibians have a 3 chambered heart

• mammals have a 3 chambered heart & amphibians have a 4 chambered heart

Multiple Choice

The atrium

• receives blood from the body

• pumps blood out of the heart

• receives oxygen rich blood from the lungs

• pumps oxygen poor blood