Respuesta :
					                   oxygen is just inhaled not maintained 
homeostasis itself is a process of maintaining
it is carbondioxide as it is exhaled in specific levels ( levels produced in body )
HOPE IT HELPS
					                
					             homeostasis itself is a process of maintaining
it is carbondioxide as it is exhaled in specific levels ( levels produced in body )
HOPE IT HELPS
 
					                  