The cell theory
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The Cell Theory. CELL THEORY. A theory resulting from many scientists’ observations & conclusions. CELL THEORY 1. The basic unit of life is the cell . ( Hooke ).

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The Cell Theory

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The cell theory

The Cell Theory


Cell theory

CELL THEORY

  • A theory resulting from many scientists’ observations & conclusions


Cell theory 1 the basic unit of life is the cell hooke

CELL THEORY1. The basic unit of life is thecell. (Hooke)

  • In 1665, an English scientist named Robert Hooke made an improved microscope and viewed thin slices of cork viewing plant cell walls

  • Hooke named what he saw "cells"


Cell theory 2 all living things are made of 1 or more cells

CELL THEORY2. All living things are made of1 or more cells.

  • Matthias Schleiden(botanist studying plants)

  • Theodore Schwann(zoologist studying animals) stated that all living things were made of cells

Schwann

Schleiden


Cell theory 3 all cells divide come from old cells virchow

CELL THEORY3. All cells divide & come from oldcells. (Virchow)

Virchow


Comparing cells

COMPARING CELLS

  • The size & shape of a cell relates to its function. (job it does)


What do all cells have in common

What do all cells have in common?


Common cell traits

COMMON CELL TRAITS

  • A cell is the smallest unit that is capable of performing life functions.


Cell membrane

CELL MEMBRANE

  • Outer covering, protective layer around ALL cells

  • For cells with cell walls,the cell membrane is inside the cell wall

  • Allows food, oxygen, & water into the cell & waste products out of the cell.


Cytoplasm

CYTOPLASM

  • gelatin-like inside cell membrane

  • constantly flows

  • aka protoplasm


Organelles

ORGANELLES

  • Many different types!


The cell theory

DNA

  • All cells have DNA (Deoxyribonucleic Acid)

  • It’s the cells genetic material.

    • In other words it is what makes up the cell, and gives it the ability to reproduce.


2 types of cells

2 Types of Cells


Prokaryotic cells proh kayr ee yah tihk

Prokaryotic Cells(proh KAYR ee yah tihk)

  • No Nucleus

  • cells without membrane-bound structures

  • EX: bacteria

    pond scum


Eukaryotic cells yew kayr ee yah tihk

Eukaryotic Cells(yew KAYR ee yah tihk)

  • Has a Nucleus

  • cells with membrane-bound structures

  • EX: animals, plants, fungi and protists


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