AP BIOLOGY

Detailed explanation-1: -Lumen is the inside space of a cellular structure, for example xylem. Lumen also refers to the tubular structure, for example xylem, an artery or an intestine. Xylem vessels are responsible for transporting water and mineral ions from a plant’s roots to its leaves.

Detailed explanation-2: -xylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support. Xylem tissue consists of a variety of specialized, water-conducting cells known as tracheary elements.

Detailed explanation-3: -Xylem is a tissue consisting of dead, hollowed-out cells that form a system of pipes. The walls of xylem cells are lignified (strengthened with a substance called lignin ). This allows the xylem to withstand pressure changes as water moves through the plant.

Detailed explanation-4: -Xylem vessels are hollow tubes or lumen with a thick strengthened cellulose cell wall. The hollow tubes act like pipes allowing water and dissolved minerals to flow through them.

Detailed explanation-5: -Xylem parenchyma. Hint: Vascular tissues are responsible for the upward transfer of water and nutrients from the roots. Complete answer: Xylem fibres have highly thickened lignified walls and obliterated central lumen.