Question

Question 15 of 20:

Select the best answer for the question
15. 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?
O A. Single loop
OB. Open
C. Recycling
OD. Double loop

Answer 1

Answer: b

Step-by-step explanation:

An open system is when nutrients and waste are moved through the body freely through the body cavity, rather than being enclosed in veins.