Complex permanent tissues have various types of cell.

Chlorenchyma is a type of parenchyma tissue, which contains chlorophyll Collenchyma tissue is composed of elongated living cells of uneven primary thick walls, which possess hemicellulose, cellulose, and pectic materials. It provides support, structure, mechanical strength, and flexibility to the petiole, leaf veins, and stem of young plants, allowing for easy bending without breakage. Parenchyma, in plants, tissue typically composed of living cells that are thin-walled, unspecialized in structure, and therefore adaptable, with differentiation, to various functions. Sclerenchyma, in plants, supports tissue composed of any of various kinds of hard woody cells. Mature sclerenchyma cells are usually dead cells that have heavily thickened secondary walls containing lignin.  

Think about the conjoint vascular bundle.

The middle lamella -  a layer of pectinaceous intercellular material lying between the walls of adjacent plant cells The primary wall is the cellulose-containing layer laid down by cells that are dividing and growing. To allow for cell wall expansion during growth, primary walls are thinner and less rigid than those of cells that have stopped growing The secondary cell wall is a structure found in many plant cells, located between the primary cell wall and the plasma membrane.    

Sieve tube elements - a sieve element of a type present in angiosperms, a series of which are joined end to end to form sieve tubes, with sieve plates between the elements. Sieve tubes - a series of sieve tube elements placed end to end to form a continuous tube. Sieve elements - an elongated cell in the phloem of a vascular plant, in which the primary wall is perforated by pores through which water is conducted. Sieve cells - an elongated tapering cell characteristic of the phloem of gymnosperms and lower vascular plants that is basically similar in form, function, and relationships to a sieve-tube element but distinguished by rather uniformly distinguished sieve areas which are not aggregated into sieve plates Synonyms for "Sieve"strainersifterscreensiftfilterscreen outGet more synonyms with Premium Subscribe

Prosenchyma - a plant tissue, consisting of elongated cells with interpenetrating tapering ends, occurring especially in vascular tissue. Xylem - a complex tissue in the vascular system of higher plants that consists of vessels, tracheids, or both usually together with wood fibers and parenchyma cells, functions chiefly in conduction of water and dissolved minerals but also in support and food storage, and typically constitutes the woody element Collenchyma, in plants, supports the tissue of living elongated cells with irregular cell walls. Collenchyma cells have thick deposits of cellulose in their cell walls and appear polygonal in cross-section  Sclerenchyma is the tissue that makes the plant hard and stiff. Sclerenchyma is the supporting tissue in plants. Two types of sclerenchyma cells exist fibers cellular and sclereids. Their cell walls consist of cellulose, hemicellulose, and lignin.    

Meristem - a region of plant tissue, found chiefly at the growing tips of roots and shoots and in the cambium, consisting of actively dividing cells forming new tissue. Sclereid -  Sclereid is a reduced form of sclerenchyma cells with highly thickened, lignified cellular walls that form small bundles of durable layers of tissue in most plants Collenchyma, in plants, supports the tissue of living elongated cells with irregular cell walls. Parenchyma, in plants, tissue typically composed of living cells that are thin-walled, unspecialized in structure, and therefore adaptable, with differentiation, to various functions.  

  Anatomy -  the scientific study of the structure of human or animal bodies

Think about it!

Complex permanent tissues are made of different cells.