Leaf | Definition, Parts, & Function | Britannica
网页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 - Wikipedia
网页A leaf (pl.: leaves) is a principal appendage of the stem of a vascular plant, [1] usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", [2][3] while the leaves, stem, flower, and fruit collectively form the shoot system. [4]
Plant Leaves and Leaf Anatomy - ThoughtCo
网页2024年10月2日 · Leaves can be found in a variety of shapes and sizes. Most leaves are broad, flat and typically green in color. Some plants, such as conifers, have leaves that are shaped like needles or scales. Leaf anatomy and shape is adapted to best suit the plant's habitat and maximize photosynthesis.
Leaf - Definition, Function and Types | Biology Dictionary
网页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.
Science of Leaves: Anatomy, Arrangement, & Adaptations
网页2023年7月12日 · Leaves grow from the stem of a plant and are typically green in color, and this is due to a chemical known as chlorophyll. Leaves serve a multitude of vital functions for plants, including the absorption of nutrients and water, as well as …
30.10: Leaves - Leaf Structure, Function, and Adaptation
网页2023年10月31日 · The xylem transports water and minerals to the leaves; the phloem transports the photosynthetic products to the other parts of the plant. Plants in cold climates have needle-like leaves that are reduced in size; plants in hot climates have succulent leaves that help to conserve water.
Parts of a Leaf With Their Structure and Functions - Science Facts
网页2023年2月2日 · A leaf is a plant organ that is flat, thin and usually green in color. It is mostly found above the ground and remains attached to the stem. The presence of pigment ‘chlorophyll’ makes the leaf green in color that helps to prepare food in plants through photosynthesis. Collectively, green leaves are called foliage.
Leaves - Biology Online Tutorial
网页Leaves are highly efficient solar energy converters. They capture light energy and through the process of photosynthesis. They are able to trap energy in the form of sugar molecules that are constructed from carbon dioxide and water (both found in the atmosphere).
Leaf Anatomy (Structure): Layers and Functions - Science Facts
网页2023年2月17日 · The different layers of a leaf include the cuticle layer, the upper epidermis, the palisade layer, the spongy layer, the lower epidermis, and the stomata. These structures work together to enable plants to perform their cellular processes, photosynthesis, respiration, and excretion. Leaf Anatomy.
30.4: Leaves - Biology LibreTexts
网页Leaves are the main sites for photosynthesis: the process by which plants synthesize food. Most leaves are usually green, due to the presence of chlorophyll in the leaf cells. However, some leaves …