Levels of organization

Question 1

Levels of organization from smallest to largest

Answer 1

Chemical level, cellular level, tissue level, organ level, system level, organism level

Question 2

Chemical level

Answer 2

Atom – the smallest units of matter

molecules – composed of two or more atoms joined together

Question 3

Cellular level

Answer 3

Combining molecules together forms cells.

Cells – basic structural and functional units of an organism, smallest living units in human body

Question 4

Tissue level

Answer 4

Groups of cells and material surrounding cells that work together to perform a particular function’s.
Four basic tissue types: epithelial tissue, connective tissue, muscular tissue, and nervous tissue.

Question 5

Organ level

Answer 5

Different types of tissues join together to form an organ. Composed of two or more different tissues, have specific functions

Question 6

System level

Answer 6

Group of related organs that have a common function. Work together to maintain health, protect against disease and allow for reproduction of the species

Question 7

Organismal level

Answer 7

Largest level of organization, includes all systems of the body that combined form human body