The cell
• All living things are made up of small, individual
units called cells
• Some organisms consist of one cell=unicellular
• others made up of many cells=multicellular
• Life processes are carried on by cells
Two Basic cell types:
• Prokaryotic: lack membrane bound
structures (nucleus) bacteria
• Eukaryotic: present in all living things
except bacteria; filled with organelles,
(membrane bound structures). NUCLEUS
–most important
Prokaryotic cell
Eukaryotic cell
Cell Size:
• Small because of the need to get things in
and out of the cell in a timely manner
• Limited by surface area to volume ratio
Cell organelles
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•
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Nucleus
Mitochondria
Golgi body
Lysosome
Vesicle
Ribosome
Endoplasmic reticulum
Nucleus
“brain”
Control center
Controls metabolism +
reproduction
Contains chromosomes
nucleus
Mitochondria
“Powerhouse”
Site of cellular
respiration
Mitochondria
Golgi body
Packaging, processing
center modifies &
transports proteins
Golgi body
Lysosome
Sac-like structure
Contains strong digestive
enzymes
“digestion center”
lysol
lysosome
vesicle
Fluid filled sacs
Store food, water,
waste
Ribosome
Small particles of
RNA
Help make proteins
ribosomes
Endoplasmic
Reticulum
Pathway for transport of
material
Large surface area
site of protein synthesis
Endoplasmic reticulum-smooth
Endoplasmic reticulum-rough