Ch. 4-6
Cytoskeleton
functions
	structure of cell
	movement of organelles within cytosol
not surrounded by membrane
2 major parts
	microfilaments
		ropelike structure
			2 twisted chains of protein(actin)
		can contract
		many found in muscle cells
	microtubules
		hollow tubes
			"plumbing pipes"
		Functions
			maintain shape of cells
			tracks for organelles to move along
			spindle fibers
				help in mitosis







Back to Cell Parts


Back to Biology Notes