Question

this model shows a horses excretory system. horses are mammals. a mammals excretory system includes its lungs, liver, kidneys, bladder, and urethra. which type of waste do the horses lungs release? carbon dioxide urine waste from undigested food

Explanation:

The horse's lungs release carbon dioxide. In the process of respiration, mammals take in oxygen and release carbon dioxide as a waste product. The lungs are the organs responsible for this gas exchange. Urine is produced by the kidneys and stored in the bladder. Waste from undigested food is related to the digestive system, not the lungs.

Answer:

carbon dioxide