The Great Diversity of Life

Unit 3: CellsChapter 7: Cell Structure and FunctionSection 7-4: The Diversity of Cellular

LifeText pages: 190-193

Vocabulary

Cell specialization Tissue Organ Organ system

4 Levels of Organization

1) Cells (muscle cells)2) Tissue (smooth muscle tissue)3) Organ (stomach)4) Organ System (digestive system)

Life surrounds every corner of the planet. Below the earth Deep under the sea Inside of bodies

REMEMBER…

All living things are composed of cells.

Cells are the basic living units of all organisms.

Unicellular Organisms

Unicellular = single celled organisms

Do everything you expect a living thing to do.

NUMEROUS- dominate life on earth Examples: yeast, algae cells,

bacteria

Multicellular Organisms

Many cells Much variety and many types Success depends upon

communication Cell specialization: process through

which cells within the organism can develop in different ways to perform different tasks.

Red Blood Cell Specialization

Red Blood Cells Transport O2 Contain protein that binds to O2 in

the lungs and carries it throughout the body.

Pancreatic Cell Specialization

Pancreas produces proteins that make digestion possible.

Contains many ribosomes and rough ER where proteins are produced.