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Biology Project

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Biology Project - Page Text Content

FC: CELL PROJECT .! | by: Essence,Simorea and Hannah

1: Cell Theory All cells come from existing cells. There the basic units of structure and function in living organisms. Hooke was the one that discovered cells.

2: Hooke | in 1655 Hooke was employed by Robert Boyle to construct the boylean air pump. Five years later, Hooke discovered his law of elasticity, which states the stretching of a solid body is porportional to the force applied to it. he was one of the first men to built a gregorian reflecting telescope. he discovered the fifth star in the trapezium, an asterism in the constellation orion. he suggested that the force of gravity could be measured by utilizing the motion of a pendulum. Hooke had discovered plant cells, what he saw were the cell walls in the cork tissue.

3: Virchow | In 1855 he proposed an important extension of cell theory that "all living cells arise from pre-existing cells"1665: English Scientist and Microscopist Robert Hooke described a honeycomb-like network of cellulae (Latin for little storage rooms) in cork slice using his primitive compound microscope. Robert Hooke used the term cells to describe units in plant tissue (thick cell walls could be observed). Of course he saw only cell walls because cork cells are dead and without protoplasm. He drew the cells he saw and also coined the word cell. The word cell is derived from the Latin word cellula which means small compartment. Hooke published his findings in his famous work, Micrographia.

4: Schleiden | All organisms are composed of cells.By 1838 his methods had led him to propose the cell theory for plants. Schleiden was the first to recognize the importance of cells as fundamental units of life. In his most well-known article, Schleiden described Robert Brown's 1832 discovery of the cell nucleus (which he renamed cytoblast). Schleiden knew that the cell nucleus must somehow be connected with cell division, but he mistakenly believed that new cells erupted from the nuclear surface like blisters. Even so, he made other accurate observations about plant cells and cell activity and his conclusions marked the beginning of plant cytology. In 1839, Theodor Schwann would expand Schleiden's cell theory to include the animal world, establishing cell theory as the fundamental concept in biology.

5: Theodor Schwann | 1836, still at the university in Berlin, he discovered in the gastric juice pepsin, a digestive enzyme for protein. It was the first enzyme that could be presented from an animal tissue.During this time he discovered that sugar and starch fermentation are not purely chemical, but life processes. He examined the muscle contraction and the structure of nerve cell. He discovered the striated muscles in the upper esophagus and the myelin sheath of peripheral nerves, which we still call him in honor of Schwann cells.

6: Prokaryotic Cells | Prokaryotic cells are different from eukaryotic cells. They don't have a membrane bound nucleus and instead of having chromosomal DNA. their genetic information is in a cellular loop called plasma. Prokaryotic cells feature three major shapes: rod shapes, spherical, and spiral.

7: Eukaryotic Cells | Contain many other membrane bound structures called organelles. These organelles such as the mitochondria or chloroplasts serve to perform metabolism functions. Organelles like intracellular parts provide structural support and cellular motility.

8: PLANT CELL | *Rectangular *Has chloroplast b/c they make their own food. *Has ribosome *Has Mitochondria *Cell Wall *One Large Central Vacuole Taking Up 90% Of Cell Volume

9: ANIMAL CELL | *Circular *No Chloroplast *Has Ribosome *Mitochondria *No Cell Wall *One Or More Small Vacuoles

10: LYSOSOME | Small and round with a single membrane. Breaks down larger food molecules into smaller molecules; digest old cell plants.

11: RIBOSOME | Located in all cells. Small bodies free or attached to ER; made of RNA and protein. Synthesizes protein.

12: NUCLEUS | In all cells except prokaryotes. Large oval. May contain one or more nucleoli. Holds DNA; controls cell activities; contains the hereditary material of the cell.

13: In animal cells, protozoans, has a 9-2 arrangement of microtubules; short but humerus. its function is movementI | CILIA

14: in Plant cells and algae; double membrane modified into sacs called thylakoids. uses energy from sun to make food(gluclose) for the plant. Releases oxygen; process called photosynthesis. | CHLOROPLAST

15: Located on plant cells, fungi and bacteria, but not animal cells, made of cellulose, allows H2O, O2, CO2 to diffuse in and out of a cell, support(grow tall) | CELL WALL

16: FLAGELLA | Rarely in plant cells, present in specialized animal cells. structures used to enable movement of cells or sometimes to propel substances across outer surface of the cells.

17: in all cell , made of microtubles 7 microfilaments, strengthen cell and maintains the shape, and moves organelles within the cell. Also, Provides internal structural support. | CYTOSKELETON

18: Let It Snow, Let It Snow, Let It Snow | CELL MEMBRANE | A Protective Layer That Covers The Cells Surface And Controls What Moves In And Out The Cell.

19: Is The Golgi complex is composed of numerous sets of smooth cisternae, which are coated with lipid membranes. Each disc-shaped cisternae forms a structure that resembles a stack of plates, called a Golgi stack. The Golgi complex contains a great number of vesicles. These vesicles are used to send molecules to the cellular membrane, where they are excreted. There are also larger secretory vesicles, which are used for selective excretion. A cell structure mainly devoted to processing the proteins synthesized in the E.R. | GOLGI APPARATUS

20: Cell membrane a cell membrane is something that lets somethings in and some things out of a cell. It is made up of lipid molecules. It can also fix itself when it is torn. There are different proteins on the surface of a cell membrane that are used for functions, the cell surface collects enzymes, surface antigens and regions.

21: Homeostasis | The tendency of an organism or a cell to regulate internal conditions, usually by a system of feedback controls so as to stabilize health and functioning, regardless of the outside changing condition.

23: The snow fell gently all the night. It made a blanket soft and white. It covered houses, flowers and ground But did not make a single sound

25: Winter Fun

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Default User
  • By: Simorea J.
  • Joined: about 5 years ago
  • Published Mixbooks: 0
  • Default User
    • By: Essence I.
    • Contributions: 12 photos , 17 pages
  • Default User
    • By: hannah j.
    • Contributions: 2 photos , 1 page

About This Mixbook

  • Title: Biology Project
  • science...
  • Tags: None
  • Started: about 5 years ago
  • Updated: about 5 years ago

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