1. Body Fluids
Body fluids are composed of water and substances dissolved within it, such as glucose,
mineral ions, and hormones.
2. Compartments of Body Fluids
Intracellular Fluid (ICF): Fluid within the cells.
Extracellular Fluid (ECF): Fluid outside the cells.
3. Subdivisions of Extracellular Fluid
Interstitial Fluid (IF): Fluid between cells.
Plasma: Fluid portion of the blood.
Transcellular Fluid: Includes cerebrospinal fluid (CSF), synovial fluid, aqueous and vitreous
humor, digestive juices, etc.
4. Composition of Body Fluids
Water is the primary component.
Electrolytes present:
- Cations: Sodium (Na⁺), Potassium (K⁺), Calcium (Ca²⁺), Magnesium (Mg² ⁺)
- Anions: Chloride (Cl⁻), Bicarbonate (HCO₃⁻), Phosphate (HPO₄²⁻), Sulfate (SO₄² ⁻)
Other solutes:
- Glucose, urea, creatinine, proteins (mainly in plasma)
5. Regulation of Body Fluids
Fluid intake regulated by the thirst center in the hypothalamus.
Fluid output occurs via urine, sweat, feces, and exhaled air.
Hormones involved:
- ADH (Antidiuretic Hormone): Promotes water reabsorption in kidneys.
Body fluids are composed of water and substances dissolved within it, such as glucose,
mineral ions, and hormones.
2. Compartments of Body Fluids
Intracellular Fluid (ICF): Fluid within the cells.
Extracellular Fluid (ECF): Fluid outside the cells.
3. Subdivisions of Extracellular Fluid
Interstitial Fluid (IF): Fluid between cells.
Plasma: Fluid portion of the blood.
Transcellular Fluid: Includes cerebrospinal fluid (CSF), synovial fluid, aqueous and vitreous
humor, digestive juices, etc.
4. Composition of Body Fluids
Water is the primary component.
Electrolytes present:
- Cations: Sodium (Na⁺), Potassium (K⁺), Calcium (Ca²⁺), Magnesium (Mg² ⁺)
- Anions: Chloride (Cl⁻), Bicarbonate (HCO₃⁻), Phosphate (HPO₄²⁻), Sulfate (SO₄² ⁻)
Other solutes:
- Glucose, urea, creatinine, proteins (mainly in plasma)
5. Regulation of Body Fluids
Fluid intake regulated by the thirst center in the hypothalamus.
Fluid output occurs via urine, sweat, feces, and exhaled air.
Hormones involved:
- ADH (Antidiuretic Hormone): Promotes water reabsorption in kidneys.
