Ch. 4-6

Cell Wall
found in Plant and fungi cells
	in fungi
		made of chitin
	in plants
	functions
		support
		protect
	structure
		long chains of cellulose
			embedded in proteins & other carbohydrates
	2 types
		primary
			develops
				while cell is being formed
				just outside cell membrane
		secondary
			develops when cell is fully formed
				between cell membrane and primary cell wall
			tough and woody
			once completed-cell cannot grow anymore
			i.e. piece of wood
	Middle lamella
		made of pectin(gooey polysaccharide)
		holds plant cells together






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