Levels of organization from simplest to most complex

What are the six levels of organization from simplest and most complex

1. Chemical level 2. Cellular level 3. Tissue level 4. Organ level 5. Organ system level 6. Organismal level

Nervous tissue

A body tissue that carries electrical messages back and forth between the brain and every other part of the body. Conducts nerve impulses

Cellular level

Consist of cells which of the smallest living structure and serve as the basic unit of structure and function in organism. Cells are formed from Atoms and molecules from chemical level. Cells have a variety of functions and as a result they very widely and structured to reflect their specialization. And example a skeletal muscle cell is long and a red blood cell is small.

Organ level

Consist of organs which are two or more tissue types performing specific functions. And example is the small intestine composed of all four types working to process and absorb digested nutrients.

Tissue level

Consist of tissues which are groups of similar cells performing common functions. 1. Epithelial tissue 2. Connective tissue 3. Muscle tissue 4. Nervous tissue

Chemical level

Involves Atoms and molecules. "Atoms" are the smallest unit of matter and example is carbon and oxygen. "Molecules" are described as one or more combined atoms an example of sugar and vitamins. The more complex molecules are called "macromolecules"such as proteins in DNA. "Organelles" are made from microscopic subunits in cells composed of macromolecules

Muscle tissue

Produces movement

Organismal level

represents the sum total of all structural levels working together to keep us alive The highest level of structural organization all body systems function interdependently in which an organism which is the living being

Organ system level

Contains related organs that work together to achieve a common function. And example the organ of the digestive system working together digest food absorb nutrients and expel waste products.

Epithelial tissue

Tissue that covers outside or surfaces of the body and lines organs and body cavities.

Connective tissue

Tissue that protects, supports and binds structures and organs