LEAF

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For more information: • http://www.7activestudio.com • [email protected] • http://www.7activemedical.com/ • [email protected] • http://www.sciencetuts.com/ • [email protected] • Contact: +91- 9700061777, • 040-64501777 / 65864777 • • 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force The Joy of Happy Learning -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. • • LEAF:The green, flat, expanded exogenous lateral appendages developed from the nodes of the stem or branches are called LEAVES.They have limited growth and are arranged acropetally. In the axils of the leaves, axillary buds are present. • FUNCTIONS OF LEAVES:They carry out photosynthesis.They control the diffusion of oxygen and carbon dioxide.They promote internal transportation of water and minerals by transpiration. • CAULINE LEAVES -- Leaves developed on the stem. Example: Cocos • RAMAL LEAVES -- Leaves developed on the branches. • RADICAL LEAVES -- Leaves developed on the roots. Example: Allium • PARTS OF A LEAF: • The structure of the leaf shows four parts, namely • 1.Leaf base, 2.Stipule, 3.Petiole and 4.Lamina. • LEAF BASE:The basal part of the leaf is called Leaf base.The leaves are attached to the stem at the node by means of leaf base. • STIPULE:The small, green, lateral appendages present on either side of the leaf base are called 'STIPULES'.They are prominent in dicots and rarely found in monocots.They protect the axillary buds in developing stages. • STIPULATE -- Leaves with stipules. • EXSTIPULATE -- Leaves without stipules. • DECIDUOUS STIPULE -- Stipules fall off by the time lamina expands. Example: Michaelia • PERSISTENT STIPULE -- Stipules remain as long as the leaf remains. Example: Pisum, Lathyrus. • BRANCHED STIPULES -- In Ipomea quamoclit, branched stipules are present. • PETIOLE:The stalk of the leaf is called Petiole.It connects the lamina to the stem.It exposes the lamina to light.It allows the leaf lamina to flutter in wind, there by cooling the leaf and bringing fresh air to surface.It bears the weight of the lamina and conducts water and food materials between the stem and leaf. • PETIOLATE -- Leaves with petiole. • SESSILE -- Leaves without petiole. • LAMINA:The green expanded part of the leaf is called 'LAMINA' or the 'LEAF BLADE'.All the important functions of the leaf are performed in this part only.The central prominent vein present in the leaf lamina is called 'MID VEIN' or 'MIDRIB'.The branches developed from the mid vein are called 'LATERAL VEINLETS'. • VEIN -- It is a branch of vascular tissue entering from stem into leaf.

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