Cheer shouldn't be band because it's something people take a lot of pride in and work for. Cheerleading is a sport because it challenges someone physically and mentally. Not every can do a cartwheel, back-handspring, tuck layout.
The ability of an organism to maintain its internal stability against external environmental changes thereby developing the constant internal environment within the organism is known as Homeostasis.
Homeostasis is deeply produced in warm-blooded animals to control body temperature, fluid balance, blood pH, and oxygen pressure, concentration of chemicals,etc.
During homeostasis process entire body system work together to maintain the balance. If not controlled or if disrupted the process will result in disease or disorder.