Applied Biology 27.3

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

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

closed circulatory system

single-loop circulatory system

open circulatory system

double-loop circculatory system

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

receives blood from the body

pumps blood out of the heart

receives oxygen rich blood from the lungs

pumps oxygen poor blood