What is the structure of a leaf?
Of extremely varied forms according to the plants and the environments, the leaves all have a tail, the petiole, and a green, flat blade, the blade. sap is conveyed by the ribs that run through the leaf.
The petiole: Part of the leaf which unites the blade to the sheath. The rib: Protruding sides on one of the surfaces, skeleton and respiratory apparatus which contains several libero-ligneous bundles. The limb: Part main, enlarged and spreading, generally rich in chlorophyll, of the leaf.
Structure of the leaf and diagram of a leaf
- The limbus. The limb, or blade, is commonly recognized as the leaf in common parlance, although this term also refers to all other parts. …
- The petiole. The petiole is the part which unites the limb of the leaf to the stem of the plant. …
- Sheath. …
- The stipulate.
The leaf, in botany, is the organ of a plant which above all allows it to capture light to carry out photosynthesis and to carry out evapotranspiration, which is the engine of the circulation of the sap.
The leaf is, in plant morphology, the specialized organ for photosynthesis in vascular plants. It is inserted into the stems of plants at the nodes. It is also the seat of breathing and perspiration. Leaves can specialize, especially to store nutrients and water.
The leaf is composed of pectin, cellulose and lignin. These components are large chemical molecules “imprisoning” many mineral elements such as calcium, potassium, sodium, magnesium, sulfur, phosphorus.
It captures the light to carry out photosynthesis and transpires, which allows the sap to rise in the plant. The set of leaves of a tall tree or plant (for example, ivy), is called the foliage. The leaves consist of the blade (A in the diagram opposite) and the petiole (B).