Science-Vocabulary 2- Levels of Organization


a collection of tissues that carry out a specialized function of the body


a living thing that has (or can develop) the ability to act or function independently

organ system

group of organs that work together to perform a specific function


a part of an organism consisting of an aggregate of cells having a similar structure and function


the basic structural and functional unit of all organisms

skeletal system

the hard structure (bones and cartilages) that provides a frame for the body of an animal

nervous system

the sensory and control apparatus consisting of a network of nerve cells

digestive system

the system that makes food absorbable into the body

circulatory system

the organs and tissues involved in circulating blood and lymph through the body