When cells in a body are not working properly and normally, they cause disruption in the body homeostasis.
Homeostatis is characterized as balance in the body but when there is any disturbance in the body, it breaks down the balance and cause imbalance. For example in the case of diabetes in which body fails to maintain the good amount of glucose in blood which results in imbalance the body which is why diabetic patients are asked to maintain and monitor their body sugar level to maintain homeostatis.
First, it belongs to the digestive system, since it's also called the large intestine. Sorry, but I don't know what else it belongs to .
I hope this helps somewhat
cardiac muscle require lot of energy to perform while skeletal muscle are used in coordinate of bone moments so they require less energy since mitochondria is powerhouse cell so it is highly concentrated in cardiac muscle...