the+cells+structure+and+function


 * __The Cell Theory__**

Living and non-living things are made of molecules or elements. In living things these molecules are called **__cells.__** **A cell is the smallest and the most basic function of the processes of life**.

Living things are made of one or more cells.
 * Those that are made of one cell are called: **u****ni-cellular**
 * Those made of two or more cells are called: **multi-cellular**.

The first scientist to discover cells was Robert Hooke. Lot of other scientists added to Hookes experiments and theories and came up with a theory called: __**The Cell Theory**__ The cell theory includes: > > > >
 * 1) All living things are composed of one or more cells.
 * 2) Cells are the basic units of structure and function.
 * 3) Cells come only from the reproduction of other existing cells.

  **__The Shape of The Cell﻿__**

Cells come in different shapes, according to their function in the body. The first example is the **White Blood Cell (WBC)**. The white blood cell changes its shape to enable it to move easily between barriers, also to make its movement inside and outside of the cell easier. The second example is about **nerve cells**. Nerve cells are long extensions that help the cell reach to various parts of the body, to be able to send and receive signals from the brain, spinal cord and other nerve cells. The last example is **skin cells**. Skin cells are flattened dead cells that cover the whole body, to provide protection to the internal organs.


 * = [[image:http://thenextweb.com/shareables/files/2011/02/red_and_white_blood_cell_and_p.jpg width="200" height="130" link="http://thenextweb.com/shareables/files/2011/02/red_and_white_blood_cell_and_p.jpg"]] ||
 * = White Blood Cells (WBC) ||
 * = [[image:https://lh3.googleusercontent.com/-RPNZzuOB02k/TWuyDi398CI/AAAAAAAAAAU/57gqmSCiZOM/s1600/educ.jpg link="https://lh3.googleusercontent.com/-RPNZzuOB02k/TWuyDi398CI/AAAAAAAAAAU/57gqmSCiZOM/s1600/educ.jpg"]] ||
 * = the nerve cell ||


 * = [[image:https://lh4.googleusercontent.com/-G-eJsM3BLIw/TXDu14IEXSI/AAAAAAAAAAY/F1pI4ZUZZKM/s1600/SPA89CADDSZ71CA5BSP2DCASI7BFMCAISA0MPCAM9LTSICACJTHLECAZJY558CATA6C87CA99WB82CASLXLL2CA5RC3TLCAJIS86KCAABA3GNCAVZW9DQCAYQ63V2CAFESE10CA8RN1T3CA25WJ25CANNA547.jpg link="https://lh4.googleusercontent.com/-G-eJsM3BLIw/TXDu14IEXSI/AAAAAAAAAAY/F1pI4ZUZZKM/s1600/SPA89CADDSZ71CA5BSP2DCASI7BFMCAISA0MPCAM9LTSICACJTHLECAZJY558CATA6C87CA99WB82CASLXLL2CA5RC3TLCAJIS86KCAABA3GNCAVZW9DQCAYQ63V2CAFESE10CA8RN1T3CA25WJ25CANNA547.jpg"]] ||
 * = the skin cell ||

__**Review questions:**__

1) Define the cell and what are the two kinds of cellular organisms and give an example of each.

2) How does the shape of the cell help it with its function?

3) What is the cell theory?

<span style="color: #008000; font-family: 'Comic Sans MS',cursive;">Vanessa:

 * 1) <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">The cell is the smallest and the most basic function of the processes of life.
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">Two kinds:
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">uni-cellular: bacteria
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">multi-cellular: plants
 * 1) <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">Shape and function:
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">WBCs changes in shape to enable it to move easily between barriers, also to make its movement inside and outside of the cell easier.
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">Nerve cells are long extensions that help it reach to various parts of the body, to be able to send and recieve signals from the brain, spinal cord and other nerve cells.
 * <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">Skin cells are flattened dead cells that cover the whole body, to provide protection to the internal organs.
 * 1) <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">Cell Theory
 * 2) <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">all living things are composed of one or more cells.
 * 3) <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">cells are the basic units of structure and function.
 * 4) <span style="color: #008000; font-family: 'Comic Sans MS',cursive;">cells come only from the reproduction of other existing cells.


 * Leen: **

1. The cell is the smallest and the most basic function of the processes of life. The two kinds of cellular organisms are the UNI-CELLULAR organisms such as protists namely amoebae and the MULTI-CELLULAR organisms such as humans.

2. a) The white blood cell changes its shape to enable it to move easily between barriers, also to make its movement inside and outside of the cell easier. b) Nerve cells are long extensions that help it reach to various parts of the body, to be able to send and recieve signals from the brain, spinal cord and other nerve cells. c) Skin cells are flattened dead cells that cover the whole body, to provide protection to the internal organs.

3. a) All living things are composed of one or more cells. b) Cells are the basic units of structure and function. c) Cells come only from the reproduction of other existing cells.

1) The cell is the smallest and most basic function of the processes of life. There are two kinds of cells: unicellular with one cell, and bi-cellular with two cells.

2) White blood cells can change in shape so as to move easily between barriers, also to move inside and outisde a cell in an easy manner. Nerve cells have long extensions that enable it to reach all parts of the body and send signals from the brain and the spinal cord to function the body.  Skin cells are flattened dead cells that cover all our body, they provide protection from the outer world to our internal organs.

3) The Cell theory is a theory scientists came up with after studying the cell, it has 3 basic elements: 1- All living things are composed of one or more cells 2- Cells are the basic units of structure and function.  3- Cells come only from the reproduction of other existing cells.


 * [Dalia] **


 * 1) A cell is the smallest and the most basic function of the processes of life ** . The two kinds of cellular organisms are: Unicellular, like bacteria, and Multicellular, like animals and plants.

2) Each cell is designed in a way that would enable it to fulfill it's function. For example, white blood cells can change in shape so as to move easily between barriers, also to move inside and outside a cell in an easily. On the other hand, nerve cells have long extensions that enable it to reach all parts of the body and send signals from the brain and the spinal cord to function the body. <span style="color: #ff00ff; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Lastly, skin cells are flattened dead cells that cover all our body, they provide protection from the outer world to our internal organs.

<span style="color: #ff00ff; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">3) Cell theory states that: 1) All living things are composed of one or more cells. 2) Cells are the basic units of structure and function. 3) Cells come only from the reproduction of other existing cells.