Biology theme 1 - life's hierarchy of organization

Tissue

A group of cells which work for a common function. (muscle, nerves, epithelial, connective)

Organ system

A group of organs which work for a common function

Community

A group of populations

Organ

A group of tissues which work for a common function

Organism

A temporary unit of life (lifespan)

Biosphere

All life and environment

Population

Group of organisms in the same place at the same time

Organelle

Parts of a cell

Global perspective

Population, community, ecosystem, biosphere

Atom

Smallest part of an element

Cell

Smallest unit of life

Molecule

The smallest part of a substance that still has substance

Organism perspective

Tissue, organ, organ system, organism

Cell perspective

Atom, molecule, organelle, cell

Levels of organization - smallest to largest

Atom, molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.

Ecosystem

Community and environment