Levels of Organization and Cells Function

Cells

Smallest unit of life.

Tissue

Group of similar cells.

Organ

Group of tissues working together.

Organ system

Group of organs that work together.

Organism

A complete living thing.

Cell Theory

All living things are made of cells.

Specialization of Cells

Cells are shaped to do specific jobs.

Nerve cells

Cells that send signals.

Muscle cells

Cells that help with movement.

Blood cells

Cells that carry oxygen.

Organelles

Parts of a cell.

Mitochondria

Powerhouse of the cell.

Vacuoles

Storage for food and waste.

Cytoplasm

Filling inside cells.

Function of Organelles

Work together to keep cells alive.

Nucleus

Control center of the cell.

Cell membrane

Outer barrier of the cell.

Interconnected Body Systems

Body systems work together.

Single Cells

One cell doing all functions.

Multiple Cells

Many cells doing different jobs.

Cell House Analogy

Comparing cell parts to a house.

Nucleus (analogy)

Cell’s control center (Parents).

Mitochondria (analogy)

Energy producer (Fireplace).

Cytoplasm (analogy)

Filling of the cell (Rooms).

Vacuole (analogy)

Storage space (Pantry).

Ribosomes (analogy)

Protein maker (Oven).

Rough ER (analogy)

Protein processor (Kitchen).

Smooth ER (analogy)

Fat maker (Dessert).

Golgi apparatus (analogy)

Delivery system (Family car).

Lysosome (analogy)

Waste remover.

Chloroplast (analogy)

Energy converter (Solar panels).

Cell wall (analogy)

Extra protection (Security).