Introduction (Homeostasis)

• Body works best when some conditions are kept within normal. e.g. body temperature, blood electrolytes values as (sodium, potassium & calcium), blood pH, & blood volume.

• To keep the condition as close to normal as possible is called Homeostasis:

• Homeostasis means keeping everything normal

• Diseases and daily factors can create imbalances such as:

  • Excessive temperatures

  • Vigorous activity

  • Use of diuretics.

• Fluids and Electrolytes Necessary for organs to perform work

Water

• 50% to 60% of healthy adult weight

• An infant has considerably more body fluid and ECF than an adult.

• Age, Sex, and amount of fat cells affect body water.

• Women and obese people have less body water

Total Body Fluids in Human Body



Functions of body water:

• Transport nutrients, electrolytes, and O2 to the cells

• Excretion of wastes

• Regulates body temperature

• Lubricates joints and membranes

• Medium for food digestion