Levels of Organization Non living Atoms Smallest part

Levels of Organization

Non living • Atoms- Smallest part of matter Molecule – 2 + bonded atoms

Living: Cell- Basic unit of life • Animal cells- blood cells, bone cells, nerve cells, skin cells • Plant cells- root cells, guard cells, tube cells

Tissue • The same kind cell working together • Animal tissue- connective, epithelial, muscle, and nerve • Plant tissue- dermal, vascular and ground tissue

Organs • Tissues that work together • Human organs- Heart, lung, brain, skin, stomach • Plant organs- leaves, stems, and roots

Organ Systems • Organs that work together • Human Organ Systems- Skeletal system, circulatory, nervous, muscular, integumentary, endocrine, digestive, reproductive, excretory, and respiratory • Plant Organ Systems – root (below ground) and shoot (above ground) system

Organism • Entire living things (organisms) • May be a single cell

Population • Same type of organism living together

Community • Several populations living together • biotic (living parts only) interacting

Ecosystem • Biotic (living) community plus the abiotic (nonliving) features

Biome • Similar ecosystems on earth together

Biosphere • Whole living layer around the globe • Includes abiotic features http: //people. hofstra. edu/geotrans/eng/ch 8 en/conc 8 en/envisys. html

Atom Molecule romolecule Organelle Cell Tissue Organ System Organism Populat Commu Ecosyst Biome Biosphe