The things inside the human body which need to be kept the same are:
Carbon Dioxide: any carbon dioxide in the body which is extra needs to be removed because if not then the body will become acidic. Carbon dioxide is breathed out in the air.
Urea: The urea is a waste chemical that is made when we digest amino acids in the liver. This chemical is poisonous therefore, must be removed. It will be removed through urinating and through sweating.
Ions: Ions are atoms and they have extra electrons or missing electrons. If the ions inside our body are not kept balanced then the cells may start to shrivel, burst or get swollen. The most important ions consist of sodium, potassium, hydrogen and phosphate. They are maintained through the water we drink and urinating. As well as this we can lose them through sweating.
Sugar: for respiration, having the right amount of sugar is crucial. If blood levels fall really low then the individual will die. The blood sugar level is controlled by the amount and the storage of glucose and that i controlled by insulin which is a hormone.
Water: In the human body, seventy percent of its mass is water. If the correct amount of water is not frequent in the body then any human being would die.
Temperature: Enzymes look after and control every chemical reaction that takes place in the human body. They work at the temperature of 37 degrees,, if too hot then we could die.
Which organs are involved?
The organs that are involved in homeostasis are:
Brain: the brain has a long lasting effect on the body because it involves hormones. The brain is also known as the control centre.
The hypothalamus: This keeps control of the amount of water, temperature and carbon dioxide content of blood. HOW DOES IT DO THIS?!
The pituitary gland: this looks after an amount of hormones including ADH.
The Liver: the liver helps keep control of the amount of glucose which is in the body by storing it as glucagon. As well as this it is important for temperature regulation and raises the rate of respiration when humans are cold.
The Lungs: the lungs are a big part of the elimination of carbon dioxide in the body.
The Pancreas: the pancreas in included by keeping a constant amount of sugar in the body. HORMONES
The muscles: The muscles in the body keep a steady and stable body temperature. Shivering helps to make heat. SHIVERING AND MUSCLES
The Kidney: the kidneys are involved in keeping the right amount of water in the body.
The skin: this is the biggest organ, and has the main role of keeping the same temperature.
Vasodilatation: This is when the body’s temperature rises. The blood vessels become wider which allows more blood to flow. The heat that is lost from the blood helps cool the blood which is circulating.
Vasoconstriction: this is when the temperature of the body falls. The blood vessels constrict. Cooler blood flows near to the surface and this makes heat loss.
Every cell in the human body needs oxygen and glucagon in order to carry out living processes. Carbon dioxide is a waste product and needs to be removed before they become harmful and damage the cells.