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10月24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.
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.
Parts of a Leaf With Their Structure and Functions - Science Facts
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. …
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.
3.4.1: External Structure of Leaves - Biology LibreTexts
Identify the main parts of a leaf. Compare petiolate and sessile leaves. Distinguish among alternate, opposite, and whorled phyllotaxes. Compare simple, pinnately compound, and palmately compound leaves. Compare parallel, pinnate, and palmate venation in leaves. Recognize common leaf margins and shapes.
30.10: Leaves - Leaf Structure, Function, and Adaptation
6 天之前 · 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.
5.3: The Leaf - Biology LibreTexts
2024年5月18日 · Features of a leaf (i.e., characters help to distinguish it) include having a bud in the axil, not growing by apex, not producing new leaves or shoots, and having hierarchal morphology (see below).