1. Body Systems

2. Cells/Tissue/Organs/Organ System
Cells are the basic building blocks of life,
Tissues are made of cells
Organs are made of tissues
Organ Systems are made of organs
These work together to help to provide all cells with nutrients, oxygen, and waste removal.

3. Human Body Systems
Each system is composed of organs and tissues which perform specific functions
These systems interact with each other to keep the body alive and healthy
Cells  Tissues  Organs  Organ Systems

4. Digestive System
The digestive system consists of organs that are responsible for the mechanical and chemical breakdown of food
The process results in
molecules that can be
absorbed and transported
to cells for energy.

5. Circulatory System The circulatory system moves substances to and
from cells where they are
needed or produced,
responding to change
demands.
It also helps protect the body from disease.
Specialized cells protect the body from infectious disease. The chemicals they produce identify and destroy microbes that enter the body.

6. Respiratory System
During respiration, cells use oxygen to release energy stored in food.
To do this, the respiratory system supplies oxygen
and removes
carbon dioxide.
(gas exchange)

7. Reproductive System
In the reproductive system, the male and female are responsible for producing sex cells necessary for the production of offspring.

8. Nervous System
The nervous system works to control and coordinate the body’s responses to changes in the environment.
It works together with all of the other systems.

9. Endocrine System
The endocrine system works together with the nervous system.
It regulates growth, development and reproduction.
Hormones are chemicals from gland that effect other body parts.

10. Excretory System
The excretory system disposes dissolved waste molecules, the elimination of solid, liquid, and gaseous wastes, and the removal of excess heat energy.

11. Musculo-Skeletal System
The muscle and skeletal systems work together in the interaction of skeletal muscles and bones.
This is coordinated by the nervous system.
They are necessary to escape danger, obtain food and shelter, and reproduce.

12. Immune Disease breaks down the structures
or functions of an organism and our body responds by destroying and invaders.
These invaders might be foreign objects, bacteria, virus, or fungi.
When this system stops working it is very easy for us to get sick.