1. Human Systems
Unit 1

2. Language Learning Goal
Define:
Organ
Organ System
Cell
Divide
Tissue

3. Content Learning Goal
Students will learn to identify what makes up a human body: cells, tissues and organs (and know examples of each).

4. What’s Your Body Made Of?
Smallest living things in the world: CELLS
Our bodies are made up of different kinds of cells
The human body has around TEN TRILLION cells (that is 10,000,000,000,000!)

5. …Continued A group of the same kind of cells is: Tissue
One tissue looks alike and does the same job…skin is made up of tissue. What are some other tissues?

6. Organs When tissues work together in your body, they form organs.
Our bodies have many organs: heart, kidney…what else?

7. Organs continued
Organs work together to keep people alive and healthy. When organs work together, they are known as Organ Systems.
We have an organ system for breathing.
What is another big job that an organ system does?

8. Cells Divide
When we were babies, we had less cells. As we grow, our cells divide and become more cells.
Dividing means they split in half. The two halves become two cells instead of one.

9. Cells Divide Continued
The same thing happens when we hurt ourselves and heal…the cells around a wound or cut divide themselves and make new cells to replace the cells that died.

10. Microscope
Vocabulary:
Dropper
Dye
Slide
Cover slip
Power – low, high

11. Close Up of a Cell – Page 100-101
Scrape the inside of your mouth with a toothpick.
Stir the toothpick in a drop of water on your slide.
Add a drop of stain and put the cover slip on top.
Put the slide in the microscope and look at your cells.

12. Close Up of a Tissue – Page 103
Look at hamburger in the microscope.
Hamburger is a muscle tissue.

13. ACTIVITY
Look at the parts of a cell and make a drawing, labeling all the different parts.