Ch. 7: The Structure & Function of Cells

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Presentation transcript:

Ch. 7: The Structure & Function of Cells Introduction to Cells

I. The Cell The basic unit of life Bacteria are the simplest cells, with animal, plant, fungi, & protists cells being more complex

II) History Behind the Cell 1665 – Robert Hooke Saw cork through one of the first microscopes 1674 – Anton van Leeuwenhoek Observed tiny organisms in a drop of pond water 1833 – Robert Brown Discovers the cell’s nucleus 1838 / 1839 – Theodore Schwann & Matthias Schleiden All plants & animals are made of cells 1855 – Rudolph Virchow All cells come from pre-existing cells

1665 – Robert Hooke

1674 – Anton van Leeuwenhoek

1838 – Matthias Schleiden

1839 – Theodore Schwann

1855 – Rudolph Virchow

III. The Cell Theory A) Cells are the basic unit of life B) All organisms are made of one or more cells C) All cells arise from preexisting cells

IV. Diversity of Cellular Life Unicellular Organisms A single-celled organism Dominate life on Earth based upon numbers

IV. Diversity of Cellular Life Multicellular Organisms Cell specialization Cells throughout an organism develop in different ways & perform different tasks

IV. Diversity of Cellular Life Level of Organization Tissues Similar cells that all perform a particular function Animals have 4 types: Muscle Epithelial Nervous Connective

IV. Diversity of Cellular Life Level of Organization Organs Many groups of tissues working together to perform a complicated task

IV. Diversity of Cellular Life Level of Organization Organ Systems Group of organs that work together to perform a specific function

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