What is xylem and their functions?explain its components and functions also.
Answers
Xylem vessels are made up of cells known either as tracheids or vessel members. All vascular plants have tracheids, which are less specialized but have a special cell wall known as a pit membrane. This structure prevents the passage of damaging air bubbles from one xylem vessel to another. These are typically the only cells found in the xylem of gymnosperms, such as pine trees, and seedless vascular plants, such as ferns. Vessel members are more specialized cells with areas that lack any cell wall or membrane, known as perforations. These allow for easy passage of water between vessels, but also allow easier passage of air bubbles that can cause fractures and disruptions to the xylem. Vessel members are the principal components of xylem in flowering plants.
Xylem cells grow within the lengthening tips of roots and shoots. In woody plants, they are the bulk of the plant tissue and grow in rings as the plant expands. The inner rings die as the plant grows, remaining in place to provide structural support.
Answer:
it is the vascular tissue in plants which conduct water and dissolved nutrients upward from the root.
they are divided in to 4 types
1.tracheids
2.vessels
3.fibres
4.parenchyma
FUNCTION
1 .tracheids: THEY ARE ELONGATED CELLS OF VASCULAR PLANTS
THEY SERVE IN TRANSPORT OF WATER AND MINERALS
SALTS
2.VESSELS:THEY CARRY WATER THROUGHOUT THE PLANT
3.FIBRES THEY ARE DISTINCTIVE CELLS OF XYLEM THAT TRANSPORT WATER
4.PARENCHYMA :THEY TRANSPORT THE DISSOLVED ORGANIC MATERIAL THROUGHOUT THE PLANT.
Explanation: