Leaf Structure and Function. The structure of a leaf is described below in detail : Parts of a Leaf. Leaves that do not have a petiole and are directly attached to the plant stem are called sessile leaves. Describes the structure and function of leaves. Botanists call the upper side the adaxial surface (or adaxis) and the lower side the abaxial surface (or abaxis). The epidermis aids in the regulation of gas exchange. List the la ers of the leaf starting at the upper cuticle all the way to the lower cuticle. : petiole - a leaf stalk; it attaches the leaf to the plant. Anatomy of Monocot Leaf: Triticum-Leaf: ADVERTISEMENTS: T.S. Each leaf typically has a leaf blade called the lamina, which is also the widest part of the leaf. It is the structure through which products of photosynthesis are moved from leaves to the entire plant. The types are: 1. Some leaves are attached to the plant stem by a petiole. midrib - the central rib of a leaf - it is usually continuous with the petiole. Leaf Base: This is the part where a leaf attaches to the stem. Leaf Structure and Function. cv+ìcÏe V lìsaåe pvsophy//4— veins a-f-ffo¿s ! The upper layer of a leaf is called the upper epidermis. epidermis, mesophyll, and vascular bundle. Blade – the main collecting structure of the leaf; Has a large, broad surface Has many layers which help the plant move and store photosynthetic materials and by - products Epidermis. Monocot and Dicot Leaf: Type # 1. Generally, leaf base, petiole, and lamina, together form the main parts of a leaf. Model 2 — Cross Section of the Internal Structure of a Leaf Cuticle Upper epidermis Chloroplast palisade mesophyll Air Space Lower epidermis Vein Spongy mesophyll Cuticle Guard cell f Stoma 8. So, the correct answer is ‘Petiole’ Q2. Two epidermal […] shows prominent ridges and grooves and reveals the following tissues: Epidermis: 1. (iii) Mesophyll tissue is present and is composed of palisade parenchyma and spongy parenchyma. stem - (also called the axis) the main support of the plant. Answers: Petiole is the stalk of a leaf that attaches the blade to the stem. A leaf is a plant organ that is flat, thin and usually green in color. Anatomy of Dicot Leaf. The presence of pigment ‘chlorophyll’ makes the leaf green in color that helps to prepare food in plants through photosynthesis.Collectively, green … % Progress . Q1. ADVERTISEMENTS: The following points highlight the top two types of monocot and dicot leafs. leaf apex - the outer end of a leaf; the end that is opposite the petiole. The internal structure of a leaf: Leaves are very important structures. Petiole – is known as the leaf stem; It is not exactly like a stem, but it does hold xylem & phloem; Holds the blade away from the stem 7. MEMORY METER. Identifying characteristics of the internal structure of dorsiventral or dicot leaf: (i) It is green, compressed with a wide lamina. The internal structure of cacti stems conforms to the pattern of broad-leaved angiosperms; a cambium layer of dividing cells, located between the woody inner tissues and those near the outside of the stem, is present. axil - the angle between the upper side of the stem and a leaf or petiole. It is … They are the plant’s food factories. Structure of a Typical Leaf. They absorb sunlight energy to make food. In petiolate leaves, the leaf stalk is long. The outermost layer of the leaf is the epidermis. Describes how leaves are made of several different kinds of specialized tissues. Under a powerful microscope, we can see three main internal parts of a leaf, i.e. lamina - the blade of a leaf. Click Create Assignment to assign this modality to your LMS. The stalk of leaf is called A. Sessile B. Plumule C. Stipule D. Petiole. 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