Cells and levels of organization

Cell

The basic unit of structure and function in living things

Organism

An individual living thing

Organ

A collection of tissues that carry out a specialized function of the body

Body System

group of organs that work together to perform a specific function

Cell wall

A rigid structure that surrounds the cell membrane and provides support to the cell

Cell membrane

A cell structure that controls which substances can enter or leave the cell.

Cytoplasm

A jellylike fluid inside the cell in which the organelles are suspended

Nucleus

Control center of the cell

Golgi Body (Apparatus)

Processes proteins and transports them

Endoplasmic Reticulum

A cell structure that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another.

Chloroplast

An organelle found in plant and algae cells where photosynthesis occurs

Ribosomes

site of protein synthesis

Lysosome

A small, round cell structure containing chemicals that break down large food particles into smaller ones.

Vacuole

Cell organelle that stores materials such as water, salts, proteins, and carbohydrates