Start studying Parts of leaf cell. Lysosomes also use their hydrolytic enzymes to destroy pathogens (disease-causing organisms) that might enter the cell. In addition to their role as the digestive component and organelle-recycling facility of animal cells, lysosomes are considered to be parts of the endomembrane system. Characteristics of Leaf 3. The unique plant cell has similar parts and functions to an animal cell but a few distinct differences. Importance. The whole leaf looks green to us, but most of the cells and cell material are colorless or clear. All plant cells have a cell wall and a cell membrane. Take a good look at the diagram and the various parts of the leaf … Parts 4. The mesophyll contains cells called chloroplasts, which convert sunlight into a stable chemical energy source the plant can utilize. Definition of Leaf: Leaf is a green, dissimilar exogenous lateral flattened outgrowth which is borne on the node of a stem or its branch and is specialised to perform photosynthesis. protect the leaf against h20 loss, injury + disease: Cuticle: wax, protective covering/prevents h2o loss: waxy part: Stomates: openings in the lower epidermis, allow exchange of gases between external + internal environment: Guard Cells Epidermis – The leaf's outer layer and protective "skin" surrounding leaf tissues. epidermis - the protective, outler layer of cells on the surface of a leaf. The guard cells (and stoma) are part of the epidermis. Photosynthesis occurs primarily in the mesophyll, which is the middle layer of a leaf. Find these structures on the attached diagram of cellular leaf tissues. Definition of Leaf 2. Below is a close diagram of the leaf structure: The basic structure of a leaf. A leaf cell is a plant cell. By Staff Writer Last Updated Mar 31, 2020 1:06:27 AM ET. Learn vocabulary, terms, and more with flashcards, games, and other study tools. guard cell - one of a pair of sausage-shaped cells that surround a stoma (a pore in a leaf). The stomata close in the night to retain gases and moisture in the leaf cells and opens during the day for gaseous exchange to continue. Notably the presence of a more rigid cell wall and the modification to photosynthesize which requires chloroplast. Plant cell parts each have their own function, from the cell wall to the chloroplast. Types 5. In What Part of a Leaf Does Most Photosynthesis Occur? The surface of many leaves is coated with a waxy cuticle which is secreted by the epidermis. Except for the thylakoid membranes , where the clorophyll molecules reside, the rest of my colors are just there to help you see the parts, and to make pretty pictures. Modification 6. The green color comes from the chlorphyll molecules in the chloroplasts. Functions 7. 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