Transcript cell
What is Inside a Cell? cell • basic building block that makes up all living things cell functions take in food get rid of wastes grow respond get to energy environment nucleus vacuole mitochondria cell membrane cytoplasm cell membrane chloroplasts cell wall vacuole mitochondria cytoplasm nucleus cell parts functions • cell • surrounds cellmembrane holds it together • allows materials to pass in & out of cell • nucleus • contains chromosomes (DNA) cell parts • cytoplasm functions • between cell membrane & nucleus • mitochondria • produce energy by cellular respiration cell parts • vacuole functions • stores H20 & breaks down materials • cell wall • outside cell membrane (only in plants) • gives extra support & protection • chloroplasts • uses Sun’s energy to (only in make food (sugar) & plants) oxygen • The cell walls of these onion skin cells can be seen in the photograph below. An Elodea leaf magnified 400X. The numerous green structures are chloroplasts. PICTURE OF A REAL CELL MEMBRANE • It has been magnified so that we can see it! The nuclei can be seen in the photograph of human cheek cells below. The Parts of a Cell The Size of Cells • Cells have a limit to how big or small they can be. • How Big is a Cell? cell membrane • surrounds cell-holds it together • allows materials to pass in & out of cell cell •basic building block that makes up all living things cytoplasm •between cell membrane & nucleus chloroplast •found in plant cells •uses Sun’s energy to make food (sugar) & oxygen cell wall • found in plants outside the cell membrane • gives extra support & protection vacuole •stores H20 & breaks down materials mitochondria •produce energy by cellular respiration cytoplasm cell membrane mitochondria chloroplast cell wall vacuole Cell parts in plants and animals The skin on the Barbie doll is like the cell membrane of a cell because both are outside surfaces, and allow substances to pass in and out of the cell. Cell Analogy Project