Lecture 1 02/16/2014
Physiologystudy of the function of the organ systems.
4 Categories of cell types:
Epithelial cells: transport mechanisms; form barrierssheet like membrane, i.e. stomach lining. Surrounds
the lumen, cavity or opening like the stomach.
Muscle cells: contractions: 3 groups:
Nerve cells or neurons: electrical signaling. A nerve is a collection of neurons; leaves the brain and goes
through the body and they also contain blood vessels.
Connective tissue cells: secrete fibrous materials: secrete collagen, fibrous tissuetendons/ligaments.
Tissues: collections of the same type of cell with similar functions.
Compartments: 67% fluid within the cellintracellular fluid about 2/3. Plasma serum7%. Remainder?
Interstitial fluidinterstitum compartment.