Levels of Organization and Body Cavities

These flashcards cover the key aspects of the levels of organization within biological systems.

Chemical Level

The level involving interactions among atoms and their combination into molecules.

Organelle

A small structure contained within a cell that performs one or more specific functions.

Cell

The basic functional unit of life, with many shared characteristics but differing in structure and function.

Tissue

A group of cells with similar structures and functions.

Organ

Composed of two or more tissue types that together perform one or more common functions.

Organ System

A group of organs classified as a unit because of a common function or set of functions.

Organism

Any living thing considered as a whole, ranging from a single cell to trillions of cells.