UNIT OVERVIEW

Your body is made of millions of tiny living parts called cells. These cells work together like a team to keep you alive and healthy.

In this unit, you will learn:

• What cells are and why they are called the basic units of life
• How to use a microscope to see cells
• The parts of a cell and what each part does
• The differences between plant and animal cells
• How cells form tissues, organs, and systems
• What the nervous, musculoskeletal, and excretory systems do

Why this matters in real life:

• Cuts heal because cells divide and repair damaged areas
• Exercise makes muscles stronger because muscle cells grow
• You need to drink water because your cells need water to work
• Sleep helps your nervous system rest and recover

By the end of this unit, you will understand how tiny living cells work together to make a whole, healthy body.

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