Cell Theory

Learning Targets I can identify the cell. I can describe a unicellular organism. I can give an example of a unicellular organism. I can describe a multicellular organism. I can give an example of a multicellular organism. I can explain the importance of the microscope in the discovery of cells. I can identify who discovered cells. I can explain why cells were named cells. I can explain the first rule of Cell Theory. I can explain the second rule of Cell Theory. I can explain the third rule of Cell Theory.

Vocabulary Cell Unicellular Multicellular Robert Hooke Cork Cell Theory

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The cell is the smallest and most basic unit of living things.

If an organism is multicellular, different cells have different jobs and all the cells work together to complete the functions of life. If an organism is unicellular, all functions of life happen in that one cell. Bacteria = unicellular

The microscope led to the discovery of cells. Robert Hooke looked at cork under a microscope in the 1660s.He noticed little compartments that reminded him of the rooms in which monks lived. Those were called cells, so he called the little compartments he saw “cells.” Robert Hooke Hooke’s microscope when he discovered and named cells.

Open Ended Question: Why did Hooke call them cells?

SO… We now know that there is something called a cell. But where do they come from??

This is why scientists have developed the idea of Cell Theory. It is 3 different ideas accepted as true by scientists across the world. Cell Theory explains from where cells come.

Rule #1 Every living thing is made up of one or more cells.

Rule #1: Every living thing is made up of one or more cells. This momma bear is made up of trillions of cells! Does this polar bear meet the criteria for Rule #1?

Rule #1: Every living thing is made up of one or more cells. This momma bear is made up of trillions of cells! Does this polar bear meet the criteria for Rule #1?

Rule #2 Cells carry out the functions needed to support life.

Rule #2: Cells carry out the functions needed to support life. Different cells in a polar bears body do different jobs. Example: Fat cells provide insulation and energy, while red blood cells carry oxygen. Does this polar bear meet the criteria for Rule #2?

Rule #2: Cells carry out the functions needed to support life. Different cells in a polar bears body do different jobs. Example: Fat cells provide insulation and energy, while red blood cells carry oxygen. Does this polar bear meet the criteria for Rule #2?

Rule #3 Cells come only from other living cells.

Rule #3: Cells come only from other living cells. All of the baby polar bear cells came from the living cells of the momma and daddy polar bears! Does this polar bear meet the criteria for Rule #3?

Rule #3: Cells come only from other living cells. All of the baby polar bear cells came from the living cells of the momma and daddy polar bears! Does this polar bear meet the criteria for Rule #3?

You will watch a video explaining the history of the Cell Theory. Stop watching at 6:30. Pay close attention! Coming Up…

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Draw a picture of cork.

Quiz: 1. What is the basic unit of life? 2. Who discovered and named cells? 3. True or False: Cells can develop from non-living materials. 4. True or False: A requirement of living things is that they are made of one or more cells.

I LOVE CREATING INTERACTIVE LESSONS THAT EDUCATORS CAN USE TO INSPIRE THEIR STUDENTS’ LEARNING! I HOPE YOU FOUND THIS LESSON HELPFUL IN ENGAGING ALL OF YOUR LEARNERS. THANK YOU! ABBY

Credits novosibirsk-zoo_n_ html novosibirsk-zoo_n_ html icon-symbols-shapes-check-mark5-ps/ icon-symbols-shapes-check-mark5-ps/ cell.jpg?w=600 cell.jpg?w= Temperature-Inside-Living-Cells.jpg Temperature-Inside-Living-Cells.jpg parasitic-invasion