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Transcript
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