cuticle layer
The spongy layer is part of a layer called the mesophyll layer, the other part is called the palisade layer. The mesophyll layer is found just below the upper epidermis and is the part of the leaf where photosynthesis happens. Photosynthesis is the process in which a plant uses carbon dioxide, water, sunlight and a chemical found in the chlorophyll it contains to make starch; a plants food source.
The part of a plant leaf that contains chloroplasts filled with chlorophyll is primarily the mesophyll, specifically the palisade mesophyll. This layer is located just beneath the upper epidermis and is densely packed with chloroplasts, allowing for efficient photosynthesis. The spongy mesophyll, found beneath the palisade layer, also contains chloroplasts but is more loosely arranged to facilitate gas exchange.
Mesophyll Cells
The region in the leaf that has air spaces to facilitate the movement of gasses is the mesophyll region. This region is composed of layers of cells.
The two functions that are served by vascular tissue is: Xylem - The process of transporting water from the roots to the aerial part of the plant. Pholem -The process in transporting the manufactured food from leaves to all through out the plant
The tissue in the interior of the leaf is called mesophyll which is the parenchyma, the essential tissue of plants. The mesophyll is divided into two groups inside a leaf; the palisade parenchyma wich is located on the upper part of leaf and the spongy parenchyma which is located on the lower part of leaf.
Mesophyll cells...
mesophyll cells
Mesophyll
in the stomata
A leaf normally consists of the following parts: the epidermis, the mesophyll, and the veins. The epidermis cover the upper and lower surfaces (the outside) of the leaf. It contains many types of cell tissues that protect against water loss, regulates the exchange of gases, secretes metabolic compounds and in some leaves controls the absorption of water. The mesophyll, or middle leaf, is where photosynthesis usually occurs. It is often made up of two layers, the palisade and the spongy layers. The veins consist of the Xylem and the Phloem tubes. The Xylem tubes carry water and minerals from the roots to the leaf and the Phloem tubes move sap out of the leaf.
Starch is primarily stored in the chloroplasts of the mesophyll cells within the leaf, particularly in the palisade mesophyll layer. During photosynthesis, these cells convert sunlight into energy, producing glucose, which is then transformed into starch for storage. The starch granules can be found within the chloroplasts of these cells, allowing the plant to utilize the stored energy when needed.