About Human Physiology

Human physiology is the science of the mechanical, physical, and biochemical functions of normal humans or human tissues or organs.

 

Human physiology is broken into four levels of study:

1.The first level is the molecular level, which includes all chemical substances that are necessary for cells to function.

2. At the tissue level, study expands to examine function of the basic types of tissue, including epithelial, muscle, nervous, and connective tissues.

3. The third level of study is the organ level. Typical organs studied include heart, liver, lungs, and stomach.

4. The fourth level of study is the system level, which studies the functions of the major systems of the human body:

• Digestive
• Nervous
• Endocrine
• Circulatory
• Respiratory
• Urinary
• Reproductive