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The Cell

http://cellimagelibrary.org/images/10381

Dead White Guys…

Matthias Schleiden(1804–1881)

Theodor Schwann 1810–1882

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The Cell Theory (1839)1. Every living organism consists of 1 or more cells.

2. The cell is the structural and functional unit of all life.

3. All living cells come from division of other, pre-existing cells. (added in 1855)

4. All cells have the same basic chemical composition.

5. All cells use energy.

6. All cells contain DNA that is copied and passed on to daughter cells.

Cell Wall

Vacuole

Mitochondria

Septum

Nucleus

Cell membrane

Cytoplasm

ANIMAL CELL

PLANT CELLBACTERIAL CELL

Cell Membrane

Nucleus

Cytoplasm

Mitochondria

Cell Wall

Cell Membrane

Nucleus

Vacuole

Chloroplast

Cytoplasm

Mitochondria

Flagellum

Cell Wall

Cytoplasm

Cell Membrane

Nucleoid

Pili

Defining Features:

*No cell wall

*Mitochondria

*No chloroplasts

*Animal cells move!

Defining Features:

*Cell Wall of cellulose

*Mitochondria

*Chloroplasts

*Vacuole

Defining Features:

*Cell Wall

*No mitochondria

*Nucleoid instead of nucleus

*Some have pili

*Some have flagellum

*No chloroplasts

Defining Features:

*Cell Wall of chitin

*Septum (separates cells, but has pore)

*Several nuclei

*Mitochondria

*Vacuole

*Apical, polarised growth

This document may be copied freely for educational purposes only.All rights reserved for commercial use. Text © Ruth Townley 2005; design and production © David Moore 2005.

FILAMENTOUS FUNGAL CELL

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The Cell Membrane

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Complex Carbohydrates

From “Biology: A guide to the natural world (David Krogh) 3rd ed. Figure 3.6

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2009 Nobel Prize in Chemistry for research on the ribosome

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http://www.xvivo.net/the-inner-life-of-the-cell/