Introduction to Physiology
1. Definition of Physiology
Physiology is the branch of biological science that studies the normal functions of living organisms
and their parts.
It focuses on how different systems in the body work together to maintain life and ensure proper
functioning.
2. Importance of Physiology
- Helps in understanding how the human body works.
- Essential for diagnosing and treating diseases.
- Provides a foundation for medical and healthcare studies.
- Explains how body systems interact to maintain homeostasis.
3. Branches of Physiology
A. Human Physiology: Study of the functions of the human body, covering organs, tissues, and
cellular mechanisms.
B. Animal Physiology: Examines how different animals adapt to their environment, including
comparative physiology.
C. Plant Physiology: Studies the functions of plants, including photosynthesis, transpiration, and
growth mechanisms.
D. Cell Physiology: Focuses on the functions of cells, including metabolism, transport mechanisms,
and cell signaling.
E. Pathophysiology: Studies how diseases affect physiological functions.
4. Levels of Physiological Organization
- Chemical Level: Atoms and molecules (e.g., water, proteins, DNA).
1. Definition of Physiology
Physiology is the branch of biological science that studies the normal functions of living organisms
and their parts.
It focuses on how different systems in the body work together to maintain life and ensure proper
functioning.
2. Importance of Physiology
- Helps in understanding how the human body works.
- Essential for diagnosing and treating diseases.
- Provides a foundation for medical and healthcare studies.
- Explains how body systems interact to maintain homeostasis.
3. Branches of Physiology
A. Human Physiology: Study of the functions of the human body, covering organs, tissues, and
cellular mechanisms.
B. Animal Physiology: Examines how different animals adapt to their environment, including
comparative physiology.
C. Plant Physiology: Studies the functions of plants, including photosynthesis, transpiration, and
growth mechanisms.
D. Cell Physiology: Focuses on the functions of cells, including metabolism, transport mechanisms,
and cell signaling.
E. Pathophysiology: Studies how diseases affect physiological functions.
4. Levels of Physiological Organization
- Chemical Level: Atoms and molecules (e.g., water, proteins, DNA).
