ABSTRACT
DISTRIBUTION OF CELLS AND TISSUES The vascular plant is composed of dermal, ground, and vascular tissue systems (124-127). The phloem and xylem constitute the vascular system; both are complex tissues in which the conducting elements (57, 119, 120) are associated with other cell types (10, 20, 128). The ground system surrounds the vascular tissues (124-127) and comprises parenchyma, collenchyma, and sclerenchyma (129-134). The dermal system is initially represented by the epidermis (125, 126) containing various cell types (126, 135). Its structure is considered in Chapter 5.
