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Phloem
Phloem – Introduction: The phloem is a vascular tissue in plants that transports the sap, a fluid that contains the nutrients and water the plant needs to grow, from the leaves to the other parts of the plant. The sap consists of sugars, amino acids, and other nutrients. The phloem is made up of tubes called sieve-tubes that are connected to small sacs called sieve-plates. The sieve-tubes are arranged in a series of tubes called phloem bundles. The sap flows from the leaves to the phloem bundles, and then to the other parts of the plant. The phloem is also responsible for transporting the plant’s waste products, such as carbon dioxide and water, from the other parts of the plant back to the leaves.
What is Phloem Tissue?
Phloem tissue is a type of plant tissue that helps transport food and water throughout the plant. It is made up of thin-walled cells called sieve tubes, which are connected to other cells in the plant called companion cells. The phloem tissue is located in the vascular tissue of the plant, which is the tissue that transports water and nutrients throughout the plant.
Components of Phloem Tissue
The phloem is a vascular tissue in plants that carries organic compounds (such as sucrose) produced in the leaves to all other parts of the plant. The phloem is composed of two cell types: sieve tubes and companion cells. The sieve tubes are long, thin cells that have pores in their cell walls that allow the organic compounds to flow from one cell to the next. The companion cells are small, round cells that surround the sieve tubes and provide them with nutrients and support.
The Sieve Elements
Sieve elements are the long, thin cells in the phloem of a plant that transport sucrose and other dissolved molecules from the leaves to the rest of the plant. They are distinguished from other phloem cells by their large size and the presence of numerous sieve plates, which are specialized regions of the cell membrane that allow molecules to flow through. The sieve elements are connected to one another by sieve tubes, which allow the sucrose to flow from one cell to the next.
Sieve Plates
A sieve plate is a flat, perforated plate that is used to separate solids from liquids or to separate one size of solid from another. The solids are trapped on the surface of the plate while the liquid or smaller-sized solids pass through the holes in the plate. Sieve plates are often used in industrial settings to purify liquids or to separate different-sized particles in a manufacturing process.
The Companion Cells
are found in close proximity to the capillaries in the small intestine. They help in the absorption of nutrients from the food we eat by secreting enzymes that digest the food. They also help in the absorption of water and minerals from the food.
Phloem Parenchyma
Phloem parenchyma is the term used to describe the thin-walled, living cells that make up the majority of the phloem tissue. These cells are involved in the transport of food and water throughout the plant, and they also play a role in the plant’s defense against pests and diseases. Phloem parenchyma cells are typically elongated and have a small diameter, and they are arranged in a random pattern.
Phloem Sclerenchyma
- Phloem is a type of plant tissue that transports the sap, or the dissolved organic substances in plants, from the leaves to the rest of the plant. The sap contains the nutrients that the plant needs to grow. Phloem is made up of cells called sieve-tube members. These cells have pores in their cell walls that allow the sap to flow through them.
- Sclerenchyma is a type of plant tissue that provides support for the plant. It is made up of cells that have thick cell walls. These cell walls give the tissue its tough, rigid texture.
