Exit ticket - Leaf Structure & Function PART 1 - Label the diagram of a leaf below, using the following information Part Description Stoma Vein Spongy Mesophyll Waxy Cuticle Upper Epidermis Palisade Cells Pores on the underside of the leaf allowing gas exchange (CO2 and O2) Contains the tissues that transport food and water. Layer of cells with air-spaces between them. Transparent layer on the top of the leaf. Single layer of flat cells covering the top surface of the leaf. Layer of long cylindrical cells containing a large amount of chloroplasts found just under the upper epidermis. Control the closing and opening of the stomatal pores. Single layer of flat cells covering the bottom surface of the leaf. Small structures within the cells where photosynthesis takes place. Guard Cells Lower Epidermis Chloroplast The chloroplasts you have labelled in the above diagram give them plant its green colour. Colour all the chloroplasts dark green. PART 2 – Which arrow shows.. The movement of water in the leaf? The movement of oxygen and water vapour in the leaf? The movement of carbon dioxide in the leaf? ( A / B / C) ( A / B / C) ( A / B / C) EXTENSION What is the name of the structure which carries water through the plant? What is the name of the structure which carries food through the plant?