Leaf - Wikipedia
A leaf (pl.: leaves) is a principal appendage of the stem of a vascular plant, [1] usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", [2] [3] while the leaves, stem, flower, and …
Leaf Definition & Meaning - Merriam-Webster
The meaning of LEAF is a lateral outgrowth from a plant stem that is typically a flattened expanded variably shaped greenish organ, constitutes a unit of the foliage, and functions primarily in food manufacture by photosynthesis.
Leaf | Definition, Parts, & Function | Britannica
2024年12月21日 · Leaf, any usually flattened green outgrowth from the stem of a vascular plant. Leaves are the primary sites of photosynthesis and manufacture food for plants. They are an integral part of the stem system and can be modified into a variety of other plant organs.
Leaf - Definition, Function and Types | Biology Dictionary
2017年8月19日 · The term leaf refers to the organ that forms the main lateral appendage on the stem of vascular plants. In general, leaves are thin, flat organs responsible for the photosynthesis of the plant. Although photosynthesis typically only occurs on the upper surface of the leaf, it can occur on both sides in some plant species.
Leaf - Simple English Wikipedia, the free encyclopedia
A leaf is a green above-ground plant organ. Its main functions are photosynthesis and gas exchange. A leaf is flat so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells.
Leaf Anatomy (Structure): Layers and Functions - Science Facts
2023年2月17日 · Learn the internal structure (anatomy) of a leaf. What are its different layers and their functions. Check out a labeled diagram.
Plant Leaves and Leaf Anatomy - ThoughtCo
2024年10月2日 · Leaf anatomy and shape is adapted to best suit the plant's habitat and maximize photosynthesis. Basic leaf features in angiosperms (flowering plants) include the leaf blade, petiole, and stipules. Blade - broad part of a leaf.
30.10: Leaves - Leaf Structure, Function, and Adaptation
2024年11月23日 · Leaf Structure and Function. The outermost layer of the leaf is the epidermis. It consists of the upper and lower epidermis, which are present on either side of the leaf. 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.
Parts of a Leaf With Their Structure and Functions
2023年2月2日 · A typical leaf shows three main parts: 1) petiole, 2) leaf base, and 3) leaf blade or lamina, each performing specific functions. 1. Petiole. It is the stalk that connects a leaf to the stem of the plant, it is made of complex conducting tissues called vascular tissues. Functions. 2. …
Anatomy and Biology of a Tree Leaf - Treehugger
2019年5月8日 · Leaves are food factories for the tree. Powered by sunlight, the green substance in leaves called chlorophyll, use carbon dioxide and water to produce life-sustaining carbohydrates (sugars)....