THE ORGANIZATION OF LIFEMISS FRISWELL 6TH GRADE LIFE SCIENCE

Levels of Organization

All life is organized into a number of different levels

These levels range from very small to very large

Let’s start off small…

Cells

basic unit of life

specialize to do different jobs

microscopic

EX: blood cell, skin cell, chicken egg

Tissues

groups of cells working together

specialized function

materials around the cells are also part of the tissue

EX: red blood cells, muscle

Organs

two or more tissues working together

specific job is performed

EX: stomach, heart, lungs, skin, stem, roots

Organ Systems

organs working together in groups with specific jobs

organs in an organ system depend on one another

EX: respiratory system, digestive system

Organisms

anything that can live on its own

unicellular - made of one cell

multicellular - made of many cells

EX: moose, Darwin, rabbit, cactus, mold

Population

all organisms of the same species living together in one place

EX: All the penguins currently living in Antarctica

Community

all the populations of various species living together in one place

this includes ALL living things, not just animals

EX: The rabbits, grass, and trees in the forest.

Ecosystem

all the living and non-living things in any given area

EX: All the fish, water, rocks, coral, and sand in a reef.