Introduction
Anatomy-study of the structure and shapes of body parts and their relationship to one another. Physiology-how the body and its parts work or function.
Chemical Level Cellular Level Tissue Level Organ Level System Level ORGANISM
Integumentary System Skeletal System Muscular System Digestive System Respiratory System Cardiovascular System Nervous System
Lymphatic System Endocrine System Urinary System Reproductive System
Organ system do not work in isolation; they work together to promote well-being of the entire body. Every cell of the human body is surrounded by external membrane, allowing needed substances to flow inside and restricting the entry of unnecessary substance.
Movement Responsiveness or irritability Digestion Metabolism Excretion Reproduction Growth
Nutrients Oxygen Water Body Temperature Atmospheric Pressure
The body’s ability to maintain relatively stable internal conditions even though the outside world is continuously changing. The body is in equilibrium when its needs are adequately met and its functioning smoothly.
This is the work of the endocrine and nervous systems. They use electrical signals to deliver the message to different parts of the body. There are 3 components of the homeostatic mechanism: 1. Receptor-receives the stimulus 2. Control Center-analyzes the information received. 3. Effector-provides means for the control center’s response.
The are 2 kinds of feedback in the homeostatic control mechanism: 1. Negative Feedback-most systems are negative feedback; the effect of the response is to shut off the original stimulus. 2. Positive Feedback-rare in the systems; controls the event; example is blood clotting and birth of the baby.
Most disease is regarded as homeostatic imbalance As we age, our body organs becomes less efficient and our internal conditions becomes less stable. When the body is subjected to trauma (car accident), the most vulnerable part is your abdominopelvic organs, because no bones surround this area.