What are the four types of cells found in xylem tissue?

Xylem consists of four distinct cell types: tracheids, vessels (tracheae), xylem parenchyma, and xylem fibers. Tracheids and vessels are dead, hollow cells that form the actual water-conducting tubes, with vessels being more efficient due to their wider diameter and perforated end walls. Xylem parenchyma cells are living cells that store food and assist in lateral transport of water. Xylem fibers are dead, thick-walled cells that provide mechanical support to the tissue. Together, these elements create an efficient system for water transport and structural reinforcement.