Question

explain the structure of xylem

Answer 1

The most distinctive xylem cells are the long tracheary elements that transport water. Tracheids and vessel elements are distinguished by their shape; vessel elements are shorter, and are connected together into long tubes that are called vessels. Xylemalso contains two other cell types: parenchyma and fibers.

@@@hope it helps@@@

Answer 2

★ XYLEM:-

→ It functions as a conducting tissue for water and minerals from roots to the stem and leaves.

→ It also provides mechanical strength to the plant parts.

→ It is composed of 4 kinds of elements like, tracheids, vessels, xylem fibres and xylem parenchyma.

• Tracheids:- These are elongated tube like dead cells with thick and lignified walls and tapering ends. Protoplasm absent. The inner layers of cell walls have thickenings which vary in form. In flowering plants, tracheids and vesselsare the main water transporting elements.

• Vessel:- It is a long cylindrical tube like structure made up of many cells, each with lignified walls and a large central cavity. Protoplasm absent.

• Vessel members are interconnected through perforations in their common walls. The vessels are a characteristic feature of angiosperms. Gymnosperms lack vessels.

• Xylem fibres:- They have highly thickened walls and obliterated central lumens. They are septate or aseptate.

• Xylem parenchyma:- Living and thin walled cells with cellulosic cell walls. They store food materials and other substances like tannins.