Phloem Definition. During transpiration water evaporates from the leaves and draws water from the roots. between the stems, roots, and leaves of plants. This lesson describes how the structures of the xylem vessel elements, phloem sieve tube elements and companion cells relates to their functions. These cells are also living cells and are not lignified. Plants perform a similar function of transporting these nutrients — what we know as sap, by using complex tissues called xylem and phloem.Xylem is the dead, permanent tissue that carries water and minerals from roots to all other parts of the plant. Xylem moves water from roots to the leaves, and phloem moves food from the leaves to the rest of the plant. The primary function of the xylem is to transport water and nutrients to all regions, but it is also involved in replacing water lost through transpiration and photosynthesis. •Vascular system: A vascular system consists of xylem and phloem. why is this? Xylem also offers mechanical support to the plant. Directly underneath the cuticle is a layer of cells called the epidermis. Xylem fibres are supportive in function. What is Phloem? Plants have transport systems to move food, water and minerals around. Functions of xylem tube: The chief function of xylem tissues is … • Xylem: Xylem is derived from Greek word “xylon” means wood. Xylem floem. the xylem and phloem are central in a root to provide support for it as it pushes through the soil what is the position of the xylem and phloem in the stem? Xylem and phloem are the two types of vascular tissues, present in plants and together constitute vascular bundles. These systems use continuous tubes called xylem and phloem. Sieve tubes are columns of sieve-tube cells with perforations on the lateral wall through which the food substances travel. The xylem parenchyma is responsible for storing the prepared food and assists in the conduction of water. Phloem, like xylem, is comprised of several specialized cells like sieve tubes, companion cells, phloem fibers, and phloem parenchyma. Schmitz K, Schneider A (1989) Structure and development of sieve cells in the secondary phloem of Larix decidua Mill, as related to function. Phloem is also the other type of vascular tissue introduced by Carl Nageli in 1858. Main function of phloem is transport of food from source to sink. Phloem is the complex tissue, which acts as a transport system for soluble organic compounds within vascular plants.. They collaborate as a spot to trigger efficacious carriage of foodstuff, vitamins, minerals as well as water. Unlike the xylem, phloem conducts in … The exchange rates of mineral cations in the xylem and phloem between root and shoot of white lupin (Lupinus albus L., cv. 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