Also, leaves have large amounts of stomata that expel the water by the process called transpiration. Transpiration is the removal of excess water from the plants into the atmosphere. Manufacture of food. It consists of the upper and lower epidermis, which are present on either side of the leaf. The leaves perform the following functions: Photosynthesis. The structures within the leaf convert the energy and make it possible for the plant to get food. A typical leaf shows three main parts: 1) petiole, 2) leaf base, and 3) leaf blade or lamina, each performing specific functions. 1. Its main functions are photosynthesis and gas exchange. The function of leaves is to help the plant produce food by converting the energy in sunlight into chemical energy that the plant can eat. The epidermis aids in the regulation of gas exchange. Veins form the midrib of the leaf, which gives a leaf structure. They convert carbon dioxide, water, and UV light into glucose through the process of photosynthesis. Photosynthesis is the primary function of leaves. As cactus leaves turned into cactus spines and lost their ability to photosynthesize, the plants had to find a new way to produce food. The process is called photosyn­thesis by which leaf manufactures food material in the presence of sunlight and green pigment- chlorophyll present in the leaf. Leaf Structure and Function. Since cacti have thick fleshy stems, these took over the job of photosynthesis. It is the stalk that connects a leaf to the stem of the plant, it is made of complex conducting tissues called vascular tissues. Leaves help absorb sunlight and carbon dioxide (CO2), and a leaf is actually an organ of the plant. Leaf pigments absorb light from the sun and store it in the form of chemical energy. Describes the structure and function of leaves. A. Botanists call the upper side the adaxial surface (or adaxis) and the lower side the abaxial surface (or abaxis). Evergreen conifers are some of the oldest trees in the world, and for good reason. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells. We have moved all content for this concept to for better organization. Leaves help plants survive through photosynthesis. Structures within a leaf convert the energy in sunlight into chemical energy that the plant can use as food. Thus the light reflected in space from plants is low. The functions of modified leaves are not dealt as they carryon spe­cialised functions as discussed earlier. Find out more about the role of leaves in this Bitesize Primary KS2 Science guide. The function of leaves: The main feature of leaves is providing food or fruits leaves directly attach with vascular and veins of the plant where they can transfer minerals waters from all parts of the tree and also extract minerals from roots to this way leaves also have its own veins; The outermost layer of the leaf is the epidermis. Petiole. Also Refer: Photosynthesis. What do plant leaves do? Without sunlight and CO2, plants would be unable to photosynthesize, so there’s a good reason some plants go a bit crazy on leaf production! The Functions of Needle Leaves. Most plants use their leaves to turn water, carbon dioxide, and light energy into the sugars their cells need to function. Please update your bookmarks accordingly. Parts of a Leaf Diagram. A leaf is an above-ground plant organ and it is green. This sending of water into the air also reduces the temperature. 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