lamina - the blade of a leaf. Explore botany by comparing the anatomical features of different botanical specimens as presented in the many books in this collection. axil - the angle between the upper side of the stem and a leaf or petiole. Simple Leaf External Anatomy Diagram Printout. Learn vocabulary, terms, and more with flashcards, games, and other study tools. EnchantedLearning.com is a user-supported site. Most trees can be identified by the leaf alone - they are unique! Sometimes leaves are divided into two or more sections called leaflets. The leaf is the primary photosynthetic organ of the plant. Q.1. Answers - Simple Leaf External Anatomy Diagram Printout: Read the definitions below, then: label the simple leaf morphology diagram. What part of a leaf helps in gas exchange? Venation Types LEAF – Internal Anatomy Leaf – Internal Anatomy Internal and External Views Deciduous Leaves & Leaf Abscission Specialized or Modified Leaves Cotyledons: embryonic or "seed" leaves. Acclimation and adaptation of leaf anatomy in response to environmental conditions will be reviewed. Ans. Q.2. Leaf buds often are less plump and more pointed than flower buds (Figure 10a). As a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages. Steve Nix Botanical Structures on a Leaf . What are the internal parts of a leaf? What are the external parts of a plant leaf? Special emphasis will be given to leaf optical properties, gas diffusion, water transport, and mechanical properties. Bipinnate leaf anatomy with labels showing alternative usages Leaves of most plants include a flat structure called the blade or lamina, but not all leaves are flat, some are cylindrical. Stomata, guard cells, epidermal cells, mesophyll cells, and vascular bundles (xylem, phloem, veins) are the internal parts of a leaf. First leaves produced by a germinating seed, often contain a store of food (obtained from the endosperm) to help the seedling become established. It consists of a flattened portion, called the blade, that is attached to the plant by a structure called the petiole. Q.3. Start studying Leaf Anatomy. In addition, we will discuss the physiological mechanisms and ecological significance of … Petiole, leaf base, lamina, leaf apex, and leaf margin are the external parts of a leaf. A tree's leaf is the best major botanical marker that helps in keying out and identifying any species of tree that has a leaf. In this book, full color photos create a visual dictionary of the key external features of a leaf including its blade, margin, apex, base, primary vein, secondary veins, petiole, auxiliary bud, and stem. Leaf Anatomy Coloring. We have moved all content for this concept to for better organization. Leaves may be simple, with a single leaf blade, or compound, with several leaflets . 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