Mr. Holmes Class

Here we are completing a KWL chart of a plant cell.  This is what we know:  plants have cell walls.plants have chloroplast.plants have ribosome.plants have lysosome.we want to know who made plantcells.we want to know why plants have cell walls.we want to know why plants have nucleous.we want to know why plants have centriole.we learned that plants have goldi body.we learned that plants have mitochondrion.we learned that plants have cell membrane.

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  What we Know: Animal have nucleus and cell membrane.We know that a animal has a lysome. Centriole separates charomati on cell dioision. Contains hered i tary material of the cell (DNA).    What we want to know we want to know what is a vacuole,ribosome,and a golgibody.We want to know what is a endoplasmid   reticutame and i wan to know what is a cytoplesm.  What We Learned:  that a animal has a cell  wall and it is made of by polarllipid . We learned that a cell membrane is a semipermable layer that covers and holds the cell to gethery segul                                                                 
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Pictured here is Anton Van leeuwenhoek(1674)van leeuwenhoek was a dutch fabric merchant but considered himself an amateur scientist.  He looked at many different things through his microscope (teeth scapings, rainwater, blood) and observed living cells which he called'animalcules'

courtesy of: www.quincy.k12.mi.us/science7cells/cell_theory.htm






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Leading Cell Theorist and Their Contributions

Cell theory is the basis for the way that biologists  study living things. Cell Theory is the most basic condition for determining if something is living. Modern Cell theory 

It states:

1. All living things are made up of cells.

2. Cells are the basic units of structure and function in living things.

3. Living cells come only from other living cells.

 

Modern Cell Theory

4.  The cell contains hereditary information which is passed on from cell to cell during cell division.

5.    All cells are basically the same in chemical composition and metabolic activities.



 

History of Cell Theory:
Robert Hooke (1665) 






Hooke was an English scientist who looked at cork through a compound microscope and observed tiny room-like structures that reminded him of the "cells" that monks lived in.  Therefore these structures became known as cells.  The cork cells where not alive so he only saw the cell wall.



 

Anton Van Leeuwenhoek (1674)

Van Leeuwenhoek was a Dutch fabric merchant but considered himself an amateur scientist.  He looked at many different things through his microscope (teeth scapings, rainwater, blood) and observed living cells which he called "animalcules".  He wrote many papers that were widely accepted by the scientific community which was unusual for a non-scholar.



 

Matthias Schleiden (1838)

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, with whom he consulted.



 

Theodor Schwann (1839)

Schwann was a German Biologist  who viewed animal parts under a microscope and discovered that animals were made up of cells. He extended Schleiden's cell theory in plants to animals, stating that all living things are composed of cells.



 

Rudolph Virchow (1855)

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.


 

 courtesy of:  www.quincy.k12.mi.us/ science7/cells/cell_theory.htm

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 Here  are some of the  plant cells. Plants have cell walls. Plants have Chloroplast. Plants have Ribosomes. Plants have Lysosomes.

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Animal cell
Here is a detailed rendering of an animal cell. Notice the internal organs.

Diffusion

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