Transcript Intro to Cells

Intro to Cells
Human Biology
All living things are made of cells
•
•
•
•
•
65% Oxygen
18% Carbon
10% Hydrogen
3% Nitrogen
2% Calcium
Levels of Organization
Organelle
• Mitochondria: powerhouse – produces energy
• Endoplasmic Reticulum – transports fluid and
chemicals throughout the cytoplasm
• Cytoplasm – all of the fluid in the cell
• Golgi apparatus – produces/collects lipids and
enzymes and packages them for export/carries
material out of the cell
Organelle continued…
• Lysosomes: contains enzymes that can break down
large molecules or invading matter (bacteria or viruses)
• Vacuoles: bubble like containers enclosed by membrane.
Contain water/help water balance.
• Nucleus: brain of cell. Directs cell activity. Stores genetic
material
• Cell membrane – controls passage of material in/out of
cell. Acts as a boundary.
A cell is like a house….
• A eukaryote cell can be compared to a
house. The walls are like the cell
membrane. The halls and stairs are like
the endoplasmic reticulum. The mailbox is
like the golgi apparatus. The furnace is
the mitochondria and the people are like
the nucleus.
Write your own analogy
• Your analogy should start with the sentence “A
cell is like a ___________”
• It should have 5-7 sentences.
• You should include six of the eight organelles we
discussed.
• Marked out of 10