08/01/19
Dr Dunja Aksentijevic
Introduction to Physiology
Study of the function of living things, how body processes occur and their mechanisms
Tissues
• Epithelial – protection, secretion, absorption
• Connective – structural support
• Muscle – movement
• Nervous – communication, coordination, control
Body Systems
• Nervous
• Immunes
• Reproductive
• Circulatory
• Respiratory
• Muscular
• Skeletal
• Integumentary
• Urinary
• Endocrine
• Digestive
Homeostasis
• Maintenance of stable internal environment
• Must communicate with external environment
• Single cell = direct communication
• Multicellular organism = communicates via internal environment
• Intracellular fluid = fluid in cells
• Extra cellular fluid =
1. Plasma (fluid portion of blood)
2. Interstitial fluid (surrounds and bathes cells)
Factors Maintained by Homeostasis
1. Nutrient molecules for energy
2. Waste products
3. O2 and CO2
4. pH – for nerve cells and enzymes
5. Water and salts for cell volume and heart rhythm
6. Temperature for enzymes
7. Volume and pressure for plasma
Dr Dunja Aksentijevic
Introduction to Physiology
Study of the function of living things, how body processes occur and their mechanisms
Tissues
• Epithelial – protection, secretion, absorption
• Connective – structural support
• Muscle – movement
• Nervous – communication, coordination, control
Body Systems
• Nervous
• Immunes
• Reproductive
• Circulatory
• Respiratory
• Muscular
• Skeletal
• Integumentary
• Urinary
• Endocrine
• Digestive
Homeostasis
• Maintenance of stable internal environment
• Must communicate with external environment
• Single cell = direct communication
• Multicellular organism = communicates via internal environment
• Intracellular fluid = fluid in cells
• Extra cellular fluid =
1. Plasma (fluid portion of blood)
2. Interstitial fluid (surrounds and bathes cells)
Factors Maintained by Homeostasis
1. Nutrient molecules for energy
2. Waste products
3. O2 and CO2
4. pH – for nerve cells and enzymes
5. Water and salts for cell volume and heart rhythm
6. Temperature for enzymes
7. Volume and pressure for plasma
