science lil shis

Atom

An atom is the smallest unit of an element that retains its chemical properties. It is made of protons, neutrons, and electrons. Atoms are the building blocks of matter

Molecule

The smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms

Macromolecule

a very large molecul

Organelle

A specialized cellular part that has a specific function and is considered analogous to an organ

Cell

A cell is a tiny part of living things. It has a special cover called a membrane. Inside, it has parts like a nucleus. Cells do all life jobs and can work alone or with other cells. They are the smallest living parts.

Tissue

An aggregate of cells usually of a particular kind together with their intercellular substance that form one of the structural materials of a plant or an animal

Organ

A differentiated structure (such as a heart, kidney, leaf, or stem) consisting of cells and tissues and performing some specific function in an organism

Organ system