Download ch 4 cell wall

ORGANELLE CLASS OF 2012
CELL WALL
MOST LIKELY TO BECOME WEIGHTLIFTING CHAMPION
Cell wall:
•
10-100 times stronger
than plasma membrane
•
Strengthened by lignin
molecules
•
Protects the cell it
surrounds
•
Provides support to
plants
•
Primary cell wall: Thin, flexible
wall of cellulose, polysaccharides,
Primary cell wall
and proteins. Created first to let
cell grow
Cytoplasm
Secondary cell wall
•
Secondary cell wall: Added in
laminated layers after primary cell
Plasmodesma
wall for strength
Plasma membrane
•
Plasmodesmata: Channels
• Cell wall surrounds the cell to
between plant cells. Water,
protect it and provide skeletal
nourishment, and chemical
support to the plant
messages shared between cells
• Cell walls only in plants
The cell wall is like the walls of a room in a skyscraper
because it protects the cell and provides support for the
overall structure, like a skyscraper’s walls protect the
things inside and allow the skyscraper to become taller.
Works Cited
Campbell, Neil A. Biology: Concepts and Connections. San Francisco: Benjamin
Cummings, 2009. Print.
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Plant cell walls and cell junctions. Biology: Concepts and Connections. By Neil
A. Campbell. San Francisco: Benjamin Cummings, 2009. 68. Print.