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Cells - Page Text Content

S: Mixbook Project


FC: CELLS | Project

1: Three Principles | The first principle is all organisms are composed of one or more cells. This basically describes how there are not any single celled organisms. We now have the technology to understand that there are single celled organisms in the world.

2: Three Principles | The second theory is that the cell is the basic unit of life. The cell theory says that cells are the fundamental units of life, that all organisms are composed of cells, and that all cells come from preexisting cells. The study of cell biology is the basically studying all life, whether single-celled or multicellular

3: Three Principles | The third theory is the statement that no cell can just be created out of nowhere but it must be created by another cell. this is proven in many scientific labs of history that when you look under a microscope and look at cells they split in half to rapidly multiply.

4: "Friends are born, not made." ~Henry B. Adams | Schwann | Schwann lived from 1810 to 1882. He discovered the digestive enzyme pepsin. He was born in Germany. He investigated muscle contraction and nerve structure. He defined the cell as the basic unit of animal structure.Schwann figured out that animals are made of cells.

5: Schleiden was German Botanist the viewed plant parts under a microscope and discovered that plant parts are made of cells. He is considered to be the co-founder of cell theory together with Schwann whom he consulted. He found that plants are made of cells after Schwann and he tried to take credit for it but they just said that he was a co-founder. | Schleiden

6: Hooke | When Hooke viewed a thin cutting of cork he discovered empty spaces contained by walls, and called them pores, or cells. The term cells stuck and Hooke gained credit for discovering the building blocks of all life. Hooke calculated the number of cells in a cubic inch to be 1,259,712,0002, and while he couldn't grasp the full effect of his discovery, he did at least appreciate the number of these cells.

7: Virchow | Virchow was a German physician that stated that all living cells come only from other living cells. His major contribution was the idea that pathologic reactions were reactions of cells. So in other words he said that people are born because of other organisms or people. Or cells are produced by other cells.

8: Prokaryotic | Prokaryotes are most always single-celled, except when they exist in colonies. These ancestral cells, now represented by members of the domains Archaea and Eubacteria, reproduce by means of binary fission, duplicating their genetic material and then essentially splitting to form two daughter cells identical to the parent.

9: Eukaryotic | Organelles, such as mitochondria and chloroplasts, are both believed to have evolved from prokaryotes that began living symbiotically within eukaryotic cells. These vital organelles are involved in metabolism and energy conversion within the cell. Also, the obvious difference is that the eukaryotic cell has a nucleus and the prokaryotic doesn't have a nucleus.

10: Plant | A plant cell is bounded by a cell wall and the living portion of the cell is within the walls and is divided into two portions: the nucleus, or central control center; and the cytoplasm, a fluid in which membrane bound organelles are found. Between the primary cell walls of adjacent plant cells, lies a pectic middle lamella. There can be a secondary cell wall which would be located just to the inside of the primary wall.

11: Animal | Animal cells do not have a cell wall. Instead of a cell wall, the plasma membrane (usually called cell membrane when discussing animal cells) is the outer boundary of animal cells. Animal tissues therefore require either external or internal support from some kind of skeleton. Frameworks of rigid cellulose fibrils thicken and strengthen the cell walls of higher plants.

12: 1. Nucleus - Controls the cell. 2. Cell Membrane - Gives the cell shape, holds the cytoplasm, and controls what moves into and out of the cell. 3. Cytoplasm - Jellylike material (cytosol and organelles), most of the cell's chemical reactions take place there, and made up of mostly water and some chemicals. 4. Vacuoles - Liquid-filled, may store food, water, minerals, or wastes. In plants it takes up a lot of space. There maybe more than one. 5. Mitochondria - Produce energy when food is broken down, often called the "powerhouse of the cell".

13: 6. Endoplasmic Reticulum - The "transportation system" in the cell, connects the nuclear membrane with the cell membrane. Used in detoxification of the cell. "ER" 7. Cell Wall - Found only in plant cells. Forms a thick outer covering outside the cell membrane, gives the plant support and shape. 8. Chloroplasts - Found only in plant cells. Found in the cytoplasm of green plant cells, contain chlorophyll, traps the energy from light, and is where photosynthesis takes place. 9. Lysosomes - digests food particles with enzymes, pinched of pieces of golgi apparatus 10. Golgi apparatus (bodies)- flat stacks, packages and secretes from cell.

14: Cell Membrane | The cell membrane functions as a barrier that makes it possible for the cytoplasm to maintain a different composition from the material surrounding the cell.

15: Homeostasis | The cell membrane functions as a barrier that makes it possible for the cytoplasm to maintain a different composition from the material surrounding the cell.

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  • By: Garrett L.
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About This Mixbook

  • Title: Cells
  • cells
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  • Started: over 6 years ago
  • Updated: over 6 years ago