Cell Theory

Cell

The basic unit of structure and function in all living organisms.

Cell Theory

The principles that all organisms are made up of one or more cells, cells are the basic building blocks of life, and all cells come from preexisting cells.

Robert Hooke

Scientist who coined the term "cells" to describe the basic units of life.

Anton Van Leeuwenhoek

Scientist who observed living cells, referred to as animalcules, after examining a drop of pond water.

Matthias Schleiden

Scientist who proposed that plant tissues are composed of cells.

Theodor Schwann

Scientist who determined that all animals are made up of cells, making the first statement of the cell theory.

Rudolf Virchow

Scientist who stated that all cells come from preexisting cells, contributing the second statement of the cell theory.

Tissue

A group of cells that work together to perform a specific function.

Organ

A structure composed of different tissues that work together to carry out specific functions.

Organism

A living being composed of multiple organs working together.