Body Systems

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.

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

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.

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.

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)

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

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.

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.

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

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.

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.