Vascular Tissue: Xylem and Phloem. Together, xylem and phloem tissues form the vascular system of plants. Vascular tissue is an example of a complex tissue, and is made of two specialized conducting tissues: xylem and phloem. Vascular plants are those varieties of plants that have special vascular tissue in them. Type # 4. These vascular tissues are arranged in different patterns in different plant groups and in different parts of the plant. The simplest and apparently most primitive type of stele is the protostele , in which the xylem is in the centre of the stem, surrounded by a narrow band of phloem. The two types of vascular tissue, phloem, and xylem are behind the movement of water, minerals, and the products of photosynthesis. In eudicots, vascular bundles are arranged in a ring within the stem. Bundles of vascular tissue scattered throughout the stem with no particular arrangement, and has no cortex. The first fossils that show the presence of vascular tissue date to the Silurian period, about 430 million years ago. Xylem and phloem in stems. Moreover, the movement takes place throughout the plant. The types of vascular tissue used for donation are the saphenous veins and femoral vessels from the lower extremities and the aortoiliac artery from the abdomen. Both are shown in f igure below. The vascular cylinder of a stem or root is called the stele . Vascular tissue includes xylem & phloem and helps with water and food transport. Pollen with a single furrow or pore. The tissues of a plant are organized to form three types of tissue systems: the dermal tissue system, the ground tissue system, and the vascular tissue system. Radial Vascular Bundle: A vascular bundle, in which the primary xylem and primary phloem strands are separated from each other by nonvascular tissues and they are situated on alternate radii of an axis, is known as radial vascular bundle or radial bundle. Xylem tissue transports water and nutrients from the roots to different parts of the plant, and includes three different cell types: vessel elements and tracheids (both of which conduct water), and xylem parenchyma. Pollen: Pollen with three furrows or pores. There are two different types of vascular tissues, called xylem and phloem. How does donated vascular tissue benefit a recipient? Xylem and phloem travel entire length of stems in discrete threads called ‘vascular bundles’. The vascular system is divided into a cortex and stele. Vascular tissue also provides structural support to leaves. Vascular Tissue System. All the tissues of a plant which perform the same general function, regardless of position or continuity in the body, constitute the tissue system. Vascular Plants. The simplest arrangement of conductive cells shows a pattern of xylem at the center surrounded by phloem. 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