Explanation: No explanation available. The periderm composed of three components: (1) Phellogen, (2) Phellem and (3) Phelloderm. In secondary state, it consists of secondary phloem and all tissues outside it. The latter designates all tissues outside the vascular cambium. In this sense it includes periderm, cortex, primary and secondary phloem. Cork Cambium. The periderm includes . In mature barks a large quantity of sclerenchyma, phloem fibres and sclereids (e.g. Beyond the cortex, the first periderm layer has formed. Cells displaced towards the outside of the vascular cambium differentiate as phloem. cork.. The term periderm is more distinct than bark. Be the first to write the explanation for this question by commenting below. The periderm includes (a) secondary phloem (b) cork (c) cambium (d) all of these. bark.b. secondary xylem.d. Thus, ‘secondary cortex’ [13] and ‘pseudo-cortex’ [14] have also been used for this zone. Alstonia) are present. Most of the phloem parenchyma cells are filled with starch grains. (1). Answer and Explanation: 33. This is a closer view of the cambium and phloem from cottonwood. secondary phloem.e. During the secondary growth in both stem and root, the peripheral tissues like epidermis, hypodermis and cortex are replaced by a new secondary tissue called the Periderm (bark). Contributors and Attributions; In roots, the formation of both secondary meristems involves the pericycle. The Secondary Xylem is not a part of the Bark and is located beneath the Vascular Cambium, far towards the inner part of the stem. Phelloderm. Cork cambium or phellogen originates in the living epidermal parenchyma or hypodermal collenchyma cells of stems. Related Questions: Male gemetes are flagellated in : Pollen tablets are avalable in the market for: Periderm, which includes, Cork. Periderm —cork cambia, cork 7. Meristems and Secondary Growth 5. periderm.c. 2. Options (a) cork (b) secondary phloem (c) cambium (d) all of these. The functional phloem … Bark —includes the periderm, patches of There are bands of phloem fibers in the secondary phloem and clusters of fibers further out into the cortex. Secondary Phloem has the same origin as secondary xylem, namely, the vascular cambium. Secondary phloem can remain active over several growth cycles. (c): Extra stelar secondary growth means growth in the cortical region, external to slele. However, the cortex can be defined as a primary ground tissue between the epidermis and vascular bundles in a stem [12]. It can be distinguished into outer non-living and inner living parts. Vascular Cambium produces new xylem cells to the inside and new phloem cells to the outside 6. and shrubs, the zone between the periderm and the secondary phloem is often referred to as ‘cortex’. Lenticels are openings in the bark of a tree that allows gaseous exchange. Secondary phloem. 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