Set of organs and tissues that perform a common function: Example: the nervous system.
They are the principal molecules of living beings. They are divided in carbohydrates, lipids, proteins and nucleic acids.
It is the structural and functional unit of every living being.
The different structures that form part of a cell.
Smallest part of a compound; is formed by the union of 2 or more atoms.
Level of organization of matter formed by protons, neutrons and electrons
Smallest part of an element (Carbon, oxygen, Hydrogen); are formed by subatomic particles.
Grouping of different tissues that constitute a structural and functional unit.
It can be unicellular or multicellular. It has the particular characteristics of a species.
Set of cells with a specific function.
