This system gets oxygen to the cells of the body and rids the body of waste gases some organisems use thier skin this is also a cell level process

All phases of matter may have a fixed mass

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!

In two sentences explain the differences of neutrophil and macrophage