Trees are composed of several main parts, including the roots, trunk, branches, leaves, and sometimes flowers or fruit.
1. Roots: The roots of a tree anchor it into the ground and absorb water and nutrients from the soil. They also provide support and stability for the tree.
2. Trunk: The trunk of a tree is the main stem that supports the branches and leaves. It is made up of layers of bark, cambium, sapwood, and heartwood. The trunk also transports water and nutrients from the roots to the rest of the tree.
3. Branches: Branches extend from the trunk and support the leaves, flowers, and fruit of the tree. They also provide structure and shape to the tree.
4. Leaves: Leaves are the primary site of photosynthesis in a tree, where they convert sunlight into energy. They also help regulate the tree's temperature and release oxygen into the air.
5. Flowers and Fruit: Some trees produce flowers that eventually develop into fruit. These structures are important for reproduction and dispersal of seeds.
Overall, the composition of trees is complex and diverse, with each part playing a crucial role in the tree's growth, survival, and reproduction.
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Nov 8
Cellular Composition
- Xylem: Transports water and nutrients from the roots to the leaves. - Phloem: Transports sugars and other nutrients from the leaves to the rest of the plant. - Cambium: A layer of cells that divides to produce new xylem and phloem. - Cortex: Protects the vascular tissues from damage. - Epidermis: The outermost layer of cells that covers the plant.
Tissue Composition
- Vascular tissues: Xylem and phloem. - Dermal tissues: Epidermis and cortex. - Ground tissues: Found between the vascular and dermal tissues. Functions include photosynthesis, storage, and support.
Organ Composition
- Roots: Anchor the plant in the ground and absorb water and nutrients from the soil. - Stems: Transport water and nutrients throughout the plant and support the leaves. - Leaves: Perform photosynthesis and exchange gases with the atmosphere.
Chemical Composition
- Cellulose: A strong polysaccharide that forms the cell walls. - Lignin: A complex polymer that strengthens cell walls. - Various carbohydrates: Sugars, starches, and cellulose. - Proteins: Enzymes, structural proteins, and storage proteins. - Minerals: Calcium, potassium, magnesium, and others. - Secondary compounds: Pigments, resins, and alkaloids.
Other Components
- Water: Makes up the majority of the living weight of a tree. - Air: Found in the spaces between cells and provides oxygen for respiration. - Microorganisms: Bacteria and fungi live in association with trees, forming symbiotic relationships.