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.

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Eukaryotic cells have organelles.
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Presentation transcript:

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 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

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