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, 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.
Plant Leaves and Leaf Anatomy - ThoughtCo
2024年10月2日 · Leaves and different parts of leaves can have various shapes and sizes. The basic components of leaves in flowering plants (angiosperms) include the blade, the petiole, and the stipules. There are three main tissues found in leaves: the epidermis, the mesophyll, as well as vascular tissue.
13.1: Leaf Parts and Arrangement - Biology LibreTexts
Leaves are generally composed of a few main parts: the blade and the petiole. Figure \(\PageIndex{2}\): A leaf is usually composed of a blade and a petiole. The blade is most frequently the flat, photosynthetic part. The petiole is a stem that attaches the leaf blade to the main stem of the plant.
30.8: Leaves - Leaf Structure and Arrangment - Biology LibreTexts
2023年10月31日 · The arrangement of leaves on a stem is known as phyllotaxy. The number and placement of a plant’s leaves will vary depending on the species, with each species exhibiting a characteristic leaf arrangement. Leaves are classified as …
30.10: Leaves - Leaf Structure, Function, and Adaptation
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 …
Parts of a Leaf With Their Structure and Functions - Science Facts
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 .
Leaf Anatomy (Structure): Layers and Functions - Science Facts
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.
3.1 Leaves – The Science of Plants - Open Textbook Library
Leaves are shoot structures that attach to stems and branches at nodes. Leaves are made up of cells that usually contain a high concentration of chloroplasts (cell organelles unique to plants) and are specialized sites for photosynthesis.