Download Cell Size - Hudson City School District

Cell Size
From Smallest to l
argest
+ Prokaryotic Cells
Size Comparison
Kind of CellSize (approximate)
• Bacteria(E. coli) 1 um
• Red Blood Cell 8 um
• Elodea epidermal cell 65 um
• Amoeba 700 um
• Hen's egg 50,000 um
Smallest Cells
• Mycoplasmas bacteria 0.1 -1.0 µm
Largest Cells
• *Ostrich Egg
• Chicken Egg
Metrics
•
•
•
•
•
1 cm = 0.01 m
(10-2)m centimeter
1 mm = 0.001 m
(10-3)m millimeter
1 µm = 0.000 001 m
(10-6)m micrometer
1 nm = 0.000 000 001 m (10-9)m nanometer
1 Å = 0.000 000 0001 m (10-10) Angstrom
Longest Cells
• Muscle and Nerve Cells
Form and Function
• Nerve
• Long to
send
impulses
Form and Function
• Muscle
• Move bones
Form and Function
• Blood Cells
• Smooth, travel
through blood
vessels
Form and Function
• Skin Cell
• Flat top for
protection
• Cube for
cushion
• As cells get larger, the surface area to volume
ratio ______________________
(increases/decreases).
• decreases
Prokaryotic Cells
Contrasting Nucleoid and Nucleus
Which are bigger?
• Prokaryotic cells
0.2- 2µm in size
• Eukaryotic cells
10- 500µm in size
Cocci
(spherical)
Bacilli
(rod)
Spiral
Cyanobacteria
Note the color: green
Bacteria Capsule
Sticky to adhere to
surfaces
Prokaryote flagella
Swimming Bacteria
How Bacteria Swim (animation link) and also one
at bottom