What is phloem and what is its function?

What is phloem and what is its function?

phloem, also called bast, tissues in plants that conduct foods made in the leaves to all other parts of the plant. Phloem is composed of various specialized cells called sieve tubes, companion cells, phloem fibres, and phloem parenchyma cells.

What is the function of phloem and xylem?

The vascular system is comprised of two main types of tissue: the xylem and the phloem. The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots.

What does phloem transport in plants?

Plants have tissues to transport water, nutrients and minerals. Xylem transports water and mineral salts from the roots up to other parts of the plant, while phloem transports sucrose and amino acids between the leaves and other parts of the plant.

How does the phloem work?

The phloem carries important sugars, organic compounds, and minerals around a plant. Sap within the phloem simply travels by diffusion between cells and works its way from leaves down to the roots with help from gravity. The phloem is made from cells called ‘sieve-tube members’ and ‘companion cells’.

What is an example of phloem?

Phloem is the tissue in plants that transport food to the parts of the plant where it needs to go. An example of the phloem is the tissue in plants that distributes the sugar that plants eat. Phloem consists of several different kinds of cells: sieve elements, parenchyma cells, sclereids, and fibers.

What are the four types of phloem?

The four elements of phloem are Sieve tubes, Companion cells, phloem fibers, phloem parenchyma.

Why are phloem cells alive?

Transport in the phloem is therefore both up and down the stem. Transport of substances in the phloem is called translocation . Phloem consists of living cells….Comparison of transport in the xylem and phloem.

	Xylem	Phloem
Type of transport	Physical process	Requires energy

What is the difference between xylem and phloem?

Xylem is the complex tissue of plants, responsible for transporting water and other nutrients to the plants. Phloem is living tissue, responsible for transporting food and other organic materials.

Is phloem living or dead?

Unlike xylem (which is composed primarily of dead cells), the phloem is composed of still-living cells that transport sap. The sap is a water-based solution, but rich in sugars made by photosynthesis.

What is the main function of phloem?

A is correct. The main function of the phloem is to transport nutrients from the source where they are produced (e.g. the leaves through photosynthesis) to the sink (e.g. flowers and fruits) where they are used.

What is the job of the phloem?

Phloem is found throughout a plant. Its job is to transport food that is made in the plant’s leaves to other parts of the plant (a process called translocation). Therefore, phloem is made up of long, flexible fibers that contain many different specialized types of cells and structures (sieve tubes, companion cells, bast fibers, and others).

How is the phloem adapted for its function?

The cells that make up the phloem are adapted to their function: Sieve tubes – specialised for transport and have no nuclei. Each sieve tube has a perforated end so its cytoplasm connects one cell to the next. Companion cells – transport of substances in the phloem requires energy.

What substances does phloem contain?

The phloem sap also contains high levels of K + and Mg 2 +. Among the anions Cl – and PO 4 3-are very common. Traces of zinc, manganese, copper, iron and molybdenum are also present.