Download Check In: WHAT ARE CELLS?

Name
Date
F U N - D A M E N TA L S
Check In:
WHAT ARE CELLS?
What are cells?
Overview
In the first part of What Are Cells?, you will be looking at
cells as the basic building blocks of life.
Think About This
Do you think a worm has cells? What about a candy worm?
Record What You See
What do all living things have in common?
On a separate sheet of paper, draw a picture of an onion skin cell.
Do all organisms have the same number of cells?
Overview
In the second part of What Are Cells?, you will be looking at how different organisms
have different numbers of cells.
Think About This
Why do you think larger organisms need more cells instead of just bigger cells?
Record What You See
Record which pond organisms were made of a single cell. Record which pond organisms
were made of many cells.
One cell (single-celled organism)
Many cells (multicellular organism)
Use a separate sheet of paper to draw pictures of the cells in an amoeba and a fish.
Worksheet: Seeing Cells
© 2008 Discovery Communications, LLC
Name
Date
F U N - D A M E N TA L S
Check Out:
WHAT ARE CELLS?
Use your Check In sheet and what you remember from the activity to answer these questions.
What are cells?
1. What is a cell?
2. You look at a sample of an unknown material under the microscope. It appears to
have cells. Has that material ever been alive? Explain.
Do all organisms have the same number of cells?
3. Name two organisms that are made of only one cell.
4. Name two organisms that are made of many cells.
5. Are all plants made of only one cell or are they made of many cells?
6. Are all animals made of only one cell or are they made of many cells?
7. Bacteria are very tiny, very simple forms of life. Do you think a bacterium is made
of only one cell or of many cells? Explain.
Worksheet: Seeing Cells
© 2008 Discovery Communications, LLC
Name
Date
F U N - D A M E N TA L S
Check In:
YOUR BODY’S CELLS
What are some types of cells found in the human body?
Overview
In Your Body’s Cells, you will be looking at some of the different types of cells that
make up the tissue of your own body’s systems.
Think About This
Why does your body need different types of cells?
Record What You See
What is a many-celled organism’s tissues made of?
What are three types of different cell tissue in plants?
Fill in the following table with information about cells in the human body’s systems.
Body system
Cell type
Job in the body system
Skin
Skeletal system
Nervous system
Circulatory system
Muscular system
Worksheet: Seeing Cells
© 2008 Discovery Communications, LLC
Name
Date
F U N - D A M E N TA L S
Check Out:
YOUR BODY’S CELLS
Use your Check In sheet and what you remember from the activity to answer these questions.
What are some types of cells found in the human body?
1. Why does your body need different types of cells?
2. What is tissue?
3. What are examples of different cell types and tissues in plants?
4. The nerve cells are part of what body system? What is their job?
5. The red blood cells are part of what body system? What is their job?
Worksheet: Seeing Cells
© 2008 Discovery Communications, LLC