PLANT CELLS LESSON 4 WHAT ARE THE STRUCTURES

PLANT CELLS LESSON 4

WHAT ARE THE STRUCTURES IN PLANT CELLS? • Cell wall • Cell membrane • Cytoplasm • Chloroplast • Mitochondria • Nucleus • Vacuole • Starch grain/ amyloplast • Ribosomes, rough endoplasmic reticulum and Golgi apparatus 2

REMEMBER THESE PARTS? PART STRUCTURE/ DESCRIPTION FUNCTION CELL MEMBRANE a thin semi-permeable membrane that surrounds the cytoplasm allows certain substances to enter and leave the cell CYTOPLAS M gel-like substance with water, enzymes and organic molecules where chemical reactions take place MITOCHON DRIA Rod shaped structures, enclosed in a double envelope Makes energy for the cell NUCLEUS Membrane bound structure Contains cell’s information and instructions for all activities 3

CELL WALL 4

CELL WALL FUNCTION • An outer covering of the cell that protects the plant cell and gives it a shape. • It prevents the plant cell from bursting if the cell becomes filled with water. The cell wall is the most visible part of the cell when viewed through a microscope 5

CHLOROPLAST 6

CHLOROPLAST FUNCTION • • • Convert sunlight to food • Site of photosynthesis – the process whereby light energy is converted to chemical energy of food (glucose) CHLOROPLAST STRUCTURE: A green compartment within the plant cells • Has many membranes stacked up like coins on the inside • Holds all the chlorophyll molecules that trap the sunlight 7

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VACUOLE IN PLANT CELLS 9

VACUOLE FUNCTION • provides support for the cell - keeping it firm with hydrostatic pressure • Storage of substances like minerals, toxins and water • Plant cells usually have one large, central vacuole, filled with liquid. 10

DIFFERENT VIEWS OF THE SAME PLANT CELL LIGHT MICROSCOPE ELECTRON MICROSCOPE 11

ACTIVITY DRAW YOUR OWN PLANT CELL IN PAINT 12