Cell History van Leeuwenhoek Hooke.

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Presentation transcript:

Cell History van Leeuwenhoek Hooke

Leeuwenhoek Made first microscope Observed tiny creatures that moved-he called them “Animicules”- now known as bacteria

Cell History All life is made of cells Discovered after microscope invented 1665: Robert Hooke first observed cork (dead plant bark) Cork reminded him of tiny rooms He named the empty boxes “cells”

CELLS The Invention of the microscope made it possible for people to discover and learn about cells

Cell Theory Schleiden Schwann Virchow Three Parts: 1) All organisms are made of one or more cells 2) Cells are the basic unit of structure and function 3) All Cells come from cells that already exist. What’s the big problem with this theory? Schwann Virchow

Schleiden 1838-Concluded that all plants are made up of cells

Schwann 1855-concluded that all animals are made up of cells

Virchow Concluded that all cells come from other cells

Cell Categories 1) Prokaryote: Pro-Before Karyote-nucleus No membrane around nucleus Oldest cells known (~4 billion years old) Believed to have evolved first (oldest fossils) AKA: Bacteria

Cell Categories 2) Eukaryote: Cells with a nucleus & membrane bound organelles Have a membrane around the nucleus More complex cells Evolved from prokaryotes Ex: Protists, Fungi, Plants, Animals

How are living things organized? Living things are organized into one of 6 kingdoms. A Kingdom is a large group that shares some similar characteristics The 6 Kingdoms are: Archeobacteria Eubacteria Protists Fungi Plants Animals

Quick Review Cells shape is related to its job (function) Cells are the basic units of life Cells come from other cells

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