Human Systems

Unit 1

Language Learning Goal

Define:

• Organ

• Organ System

• Cell

• Divide

• Tissue

Content Learning Goal

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

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!)

…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?

Organs

• When tissues work together in your body, they form organs.

• Our bodies have many organs: heart, kidney…what else?

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?

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.

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.

Microscope

Vocabulary:• Dropper• Dye• Slide• Cover slip• Power – low, high

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.

Close Up of a Tissue – Page 103

• Look at hamburger in the microscope.

• Hamburger is a muscle tissue.

ACTIVITY• Look at the parts of a cell and

make a drawing, labeling all the different parts.

electron

neutron

proton