Fish respiratory systems exchange gas and receive oxygen at the gills. this oxygen then enters the blood stream and is pumped through the heart and back through the gills without first returning to the heart. this order of events best describes which type of circulation system?

a) double loop
b) single loop
c) open
d) recycling

me

This type of circulatory system is called the open circulatory system... :)

Single loop

Explanation:

The circulatory system of the fishes are considered as the single loop circulatory system because they have a single circulatory pattern.

Deoxygenated blood from the body reaches the heart which is then pushed towards the gills. The gaseous exchange takes place between the outer environment and gills and then oxygenated blood is circulated through out the body.

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

multiply it by 5 in order for you to understand i cant give an exact answer.