Bark —includes the periderm, patches of Secondary Phloem has the same origin as secondary xylem, namely, the vascular cambium. secondary xylem.d. Secondary phloem can remain active over several growth cycles. The functional phloem … Options (a) cork (b) secondary phloem (c) cambium (d) all of these. In this sense it includes periderm, cortex, primary and secondary phloem. Cells displaced towards the outside of the vascular cambium differentiate as phloem. In mature barks a large quantity of sclerenchyma, phloem fibres and sclereids (e.g. bark.b. Secondary phloem. Phelloderm. Periderm —cork cambia, cork 7. 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). The periderm composed of three components: (1) Phellogen, (2) Phellem and (3) Phelloderm. The periderm includes . In secondary state, it consists of secondary phloem and all tissues outside it. It can be distinguished into outer non-living and inner living parts. Secondary phloem, like secondary xylem, is a complex tissue. The latter designates all tissues outside the vascular cambium. (1). Answer to Heartwood and sapwood consist ofa. Meristems and Secondary Growth 5. periderm.c. This is a closer view of the cambium and phloem from cottonwood. Cork Cambium. secondary phloem.e. Cork cambium or phellogen originates in the living epidermal parenchyma or hypodermal collenchyma cells of stems. Be the first to write the explanation for this question by commenting below. Lenticels are openings in the bark of a tree that allows gaseous exchange. (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]. 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. Correct Answer: all of these. There are bands of phloem fibers in the secondary phloem and clusters of fibers further out into the cortex. cork.. Thus, ‘secondary cortex’ [13] and ‘pseudo-cortex’ [14] have also been used for this zone. Related Questions: Male gemetes are flagellated in : Pollen tablets are avalable in the market for: The periderm includes (a) secondary phloem (b) cork (c) cambium (d) all of these. Alstonia) are present. Most of the phloem parenchyma cells are filled with starch grains. Vascular Cambium produces new xylem cells to the inside and new phloem cells to the outside 6. Answer and Explanation: 33. Periderm, which includes, Cork. Explanation: No explanation available. For extrastelar secondary growth the cork cambium or … 2. The term periderm is more distinct than bark. and shrubs, the zone between the periderm and the secondary phloem is often referred to as ‘cortex’. Beyond the cortex, the first periderm layer has formed. 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