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Cells
Organelles and Their Functions
22
Biology
Not Applicable
10/18/2005

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Term
Cell Membrane
Definition
Selective covering for both procaryotice and eukaryotic (animal and plant) cells. Chooses what goes out or comes into a cell.
Term
Cell Wall
Definition
Maintains the shape of a cell.

Can be found in procaryotic cells and plant cells.

Is not selective.
Term
Cytoskeleton
Definition
Helps maitnain the cell's shape and is responsible for the internal movement of organelles.
Term
Cytoplasm
Definition
Water-like substance that fills the cell and suspends the organelles.
Term
Nucleus
Definition
Control center of the cell where cromatin is found.
Term
Nucleolus
Definition
Found in the nucleus.

Makes ribosomes.
Term
Endoplasmic Reticulum
Definition
Organelle responsible for transporting protiens.
Term
Golgi Aparatus
Definition
Pakages protiens for movement inside or out of the cell.
Term
Ribosome
Definition
Organelles responsible for making protiens.
Term
Lysosome
Definition
Organelle that contains digestive enzymes to break down foods.
Term
Mitochondria
Definition
Power house of the cell.

Organelle where stored energy is realeased. ATP
Term
Chromatin/Chromosomes
Definition
DNA molecules found in nucleus that contain the genetic information for the cell.
Term
Vacuole
Definition
Found commonly in plant cells.

Organelle where food, enzymes, and waste are teporarily stored.
Term
Cilla
Definition
Short, hair like structures which surround the cell and help to move it.
Term
Flagella
Definition
Long, threadlike structure that moves a cell in a whiplike (draglike) motion.
Term
Chloroplast
Definition
Found in plant cells.

Organelle responsible for photosyntheses.
Term
Robert Hooke
Definition
First noticed and named dead cells.
Term
Leeuwenhoek
Definition
First to study living cells.

(blood cells and bacteria from scraping his teeth)
Term
Schleiden
Definition
Observed that all plants are made of cells.
Term
Schwann
Definition
Observed that all animals are made of cells.
Term
Virchow
Definition
Observed that cells only come from other cells.
Term
Cell Theory
Definition
1. All organisms are composed of cells.

2. The cell is the basic unit of life.

3. Cells only come from other cells.
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