Movement of a material from of higher concentration to an area of low concentration
Osmosis
Movement of water toward an area of high solute concentration
The more solute dissolved in a given volume, the more concentrated
Cell needs a lot of water
Hierarchy of Organisms
The levels of organization within each animals form a hierarchy (most complex -> least complex)
Levels of organization
1. Cellular level
2. Tissue level
3. Organ level
4. Organ system level
5. Organism level
Cell
Smallest unit of the organ tissue smaller cells that perform a particular but limited function
Organ
A structure composed of different tissues working together to perform a complex body function
Organ System
One or more organs and structures that work together to perform a major vital body function such as digestion or reproduction
Organ System functions
Obtaining oxygen and nutrients
Eliminating wastes
Sensing and responding to the environment
Growing and repairing damage
Reproduction
Tissue
A collection of similar cells that perform a particular but not limited function
Epithelial tissue
Skin lining of the digestive system, tightly sheets of tightly packed cells covering surfaces and lining internal organs, protection for dehydration, low friction surfaces
Connective tissue
Bones, tendons, blood, various types of cells and fibers held by a liquid, supports and insulation
