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hypodermis
hy·po·der·mis H0366300 (hī′pə-dûr′mĭs) also hy·po·derm (hī′pə-dûrm′)n.1. An epidermal layer of cells that secretes an overlying chitinous cuticle, as in arthropods.2. Botany A layer of cells lying immediately below the epidermis.3. Anatomy A subcutaneous layer of loose connective tissue containing a varying number of fat cells.hypodermis (ˌhaɪpəˈdɜːmɪs) , hypoderm or hypoderman1. (Botany) botany a layer of thick-walled supportive or water-storing cells beneath the epidermis in some plants2. (Zoology) zoology the epidermis of arthropods, annelids, etc, which secretes and is covered by a cuticle[C19: from hypo- + epidermis]hy•po•der•mis (ˌhaɪ pəˈdɜr mɪs)
n. 1. an underlayer of epithelial cells in arthropods and certain other invertebrates that secretes the overlying cuticle or exoskeleton. 2. Bot. a tissue or layer of cells beneath the epidermis. [1865–70; hypo- + (epi)dermis] hy`po•der′mal, adj. Thesaurus| Noun | 1. | hypodermis - layer of cells that secretes the chitinous cuticle in e.g. arthropodslayer - thin structure composed of a single thickness of cellsbody covering - any covering for the body or a body part |
Hypodermis
hypodermis[‚hī·pə′dər·mis] (botany) The outermost cell layer of the cortex of plants. Also known as exodermis. (invertebrate zoology) The layer of cells that underlies and secretes the cuticle in arthropods and some other invertebrates. Hypodermis in invertebrates (for example, crustaceans, arachnids, and insects), the thin layer of usually cylindrical epithelium lying immediately under the cuticle (which is formed by the secretory activity of the cells of the hypodermis). The various cutaneous glands and the tactile and olfactory hairs are located in the hypodermis. In nematodes, gastrotrichs, and several other worms, the hypodermis is a syncytium that secretes the cuticle. In plants, the hypodermis is one or more layers of cells located under the epidermis of the stems, leaves, seeds, and fruits, or under the epiblem (piliferous layer) of the roots. The hypodermis is part of the primary cortex of stems, often consisting of cells with thickened walls, and may be classified by function as mechanical tissue. It is most characteristic of succulents. In leaves the hypodermis consists of one, or more often several, layers of cells of aquiferous tissue (for example, in a number of tropical plants) or of mechanical tissue (for example, in pines and sago palms). In the leaf the hypodermis is formed when the cells of the epidermis are divided by septa that are parallel to the surface of the leaf, such as in Ficus and Begonia, or from cells of the mesophyll of the leaf tissue lying under the epidermis, such as in some palms. In roots the outer layers of cells of the primary cortex are sometimes called the exodermis. hypodermis
sub·cu·ta·ne·ous tis·sue [TA] an irregular layer of adipose and connective tissue, stroma, or membrane immediately deep to the skin and superficial to the deep fascia, usually consisting primarily of either just loose connective tissue [TA] (textus connectivus laxus [TA]), or a fatty layer [TA] (panniculus adiposus [TA]) that may also include a muscle layer [TA] (stratum musculosum [TA]), and/or a fibrous layer [TA] (stratum fibrosum [TA]}; it may occur as a membranous layer [TA] (stratum membranosum [TA]) only, being nearly devoid of fat (as in the auricles, eyelids, scrotum, and penis); it is penetrated by, and gains support from, skin ligaments [TA] (retinacula cutis [TA]) extending between the dermis and the deep fascia; cutaneous nerves and superficial vessels course within the subcutaneous tissue, with only their terminal branches passing to the skin; of the body's coverings, this layer varies most between sexes and in different nutritional states. Terminologia Anatomica [TA] has recommended that the terms "superficial fascia" and "deep fascia" not be used generically in an unqualified way because of variation in their meanings internationally. The recommended terms are "subcutaneous tissue [TA] (tela subcutanea)" for the former superficial fascia, and "muscular fascia" or ("visceral fasci viscera[is]") in place of deep fascia. Synonym(s): tela subcutanea [TA], hypodermis ☆ , fascia superficialis, hypoderm, stratum subcutaneum, subcutis, superficial fasciahypodermis (hī′pə-dûr′mĭs) also hypoderm (hī′pə-dûrm′)n.1. An epidermal layer of cells that secretes an overlying chitinous cuticle, as in arthropods.2. Botany A layer of cells lying immediately below the epidermis.3. Anatomy A subcutaneous layer of loose connective tissue containing a varying number of fat cells.su·per·fi·cial fas·ci·a (sū'pĕr-fish'ăl fash'ē-ă) A loose, fibrous envelope beneath the skin, containing fat in its meshes (panniculus adiposus) or fasciculi of muscular tissue (panniculus carnosus); it contains the cutaneous vessels and nerves and is in relation by its undersurface with the deep fascia.
Synonym(s): hypodermis, tela subcutanea. hypodermis the layer of cells immediately under the epidermis of plant leaves. The layer is sometimes used for water storage or for mechanical strengthening for extra protection.hypodermis
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