* Atoms: The basic units of matter, like carbon, hydrogen, oxygen, and nitrogen.
* Molecules: Two or more atoms joined together, like water (H₂O) and glucose (C₆H₁₂O₆).
These chemicals interact to form the larger structures that make up the body.
Here's how the levels of organization build on each other:
1. Chemical level: Atoms and molecules
2. Cellular level: Cells, the basic structural and functional units of life
3. Tissue level: Groups of similar cells working together, like muscle tissue or nervous tissue
4. Organ level: Different tissues combined to perform a specific function, like the heart or stomach
5. Organ system level: Multiple organs working together, like the digestive system or the nervous system
6. Organismal level: The entire human being, a complex and coordinated system of all the levels above.
So, while all levels of organization are important, the chemical level is the foundation upon which all other levels are built.
