Anatomy - levels of structural organization in the human body

chapter one
name the 6 levels of structural organization of the human body
1. chemical level; 2. cellular level; 3. tissue level; 4. organ level; 5. system; and 6. organismal
chemical level
includes atoms organized into molecules
(example: DNA, glucose)
cellular level
molecules are organized into cells which are the basic structural and functional living units an organism
(example: muscle cells, nerve cells, blood cells)
tissue level
cells are organized into tissues to perform a particular function
(example: epitheleal, connective, muscle and nervous tissues)
organ level
structures that are composed of 2 or more different types of tissues, that have specific functions and usually have recognizable shapes
(example: liver, stomach, heart, lungs, brain)
system level or organ-system level
consists of related organs with a common function
(example: digestive system, which breaks down and absorbs food, and includes the mouth, salivary glands, esophagus, stomach, small intestine, large intestine, liver, gallbladder and pancreas)
organismal level
all the systems are structurally integrated and function cooperatively to constitute the total organsim
(example: the human body)