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

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

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