Medical Biology: Cell Structure and Function

A fundamental theory in biology stating that all organisms are made of one or more cells, all life functions occur within cells, and all cells come from pre-existing cells.

An organism composed of a single cell that performs all life functions within that cell, such as a bacterium or yeast.

An organism composed of many different cells that work together, performing various specialized functions.

A type of cell that lacks a true nucleus and membrane-bound organelles. It's often smaller than eukaryotic cells.

Small size, cell wall, lack of a nuclear envelope, no histones, no organelles (besides ribosomes), and binary fission division. Examples include Bacteria and Archaea.

The basic membrane-bound unit of life, containing fundamental molecules within all living things, maintaining homeostasis.

British scientist who first used the word "cell" to describe these tiny units of life in 1665.

Scientists Schwann, Schleiden, and Virchow whose work combined to form the fundamental Cell Theory.

The hierarchical arrangement of life from atoms to molecules, cells, tissues, organs, organ systems, and organisms.

A group of similar cells working together to perform a specific function.

A structure composed of different tissues working together to perform a complex function.

A group of organs working together to perform a major life function.

A cell that can divide and develop into different types of cells.

The specific role a cell plays in an organism, such as muscle contraction, nerve impulse transmission, or hormone production.