PPT-Specialized Cells of the Epidermis

2 Melanocytes Found deep in the epidermis as melanin is made it accumulates in granules called melanosomes Exposure to sunlight can also increase the amount of melanin produced Skin color . ‘Starter’ Plants. Stinkwood. Pepperwood. Rangiora. Crown fern…. Parts of a Plant. Pollination. Wind . vs. Insect Pollinated Flowers. Fuchsia Flowers. The flowers are very decorative; they have a pendulous "teardrop" shape and are displayed in profusion throughout the summer and autumn, and all year in tropical species. . Keratinization. is the process of replacing viable cells in the stratum basale with more and more of the waxy keratin protein as cells move from the deepest layer to the surface layer.. Constant friction can stimulate the process and produce a callus (an even thicker buildup of keratinocytes in the stratum . What are the major characteristics of the skin?. Waterproof, stretchable,washable, and permanent-press, that automatically repairs small cuts, rips and burns and is guaranteed to last a lifetime.. Surface area of up to 2.2 square meters. Chapter 7. Outline. Introduction. Leaf Arrangements and Types. Internal Structure of Leaves. Stomata. Mesophyll. and Veins. Specialized Leaves. Autumnal Changes in Leaf Color. Abscission. Human and Ecological Relevance of Leaves. THE INTEGUMENTARY IS THE LARGEST ORGAN OF THE BODY. IT CONSISTS OF TWO COMPONENTS:(1) THE SKIN, AND (2)THE EPIDERMAL DERIVATIVES, SUCH AS THE HAIR, NAILS AND GLANDS.. THE SKIN IS OF PARTICULAR SIGNIFICANCE IN A CLINICAL EXAMINATION. FOR EXAMPLE, THE COLOR OFTHE SKIN MAY INDICATE THE EXISTENCE OF A PATHOLOGIC CONDITION: A YELLOW COLOR INDICATES JAUNDICE; A BLUE-GRAY COLOR MAY INDICATE CYANOSIS, REFLECTING A PATHOLOGIC CONDITION OF CARDIOVASCULAR AND RESPIRATORY FUNCTION S; A PALE COLOR IS INDICATIVE OF ANEMIA; LACK OF SKIN PIGMENTATION SUGGESTS ALBINISM, A GENETIC TRAIT CHARACTARIZED BY LACK OF THE ENZYME TYROSINASE, INVOLVED IN THE CONVERSION OF THE AMINO ACID TYROSINE TO MELANIN.. Leaf structure. The leaf has three main sections to it.. Cuticle.. Epidermis.. Mesophyll.. Cuticle. Epidermis. Palisade mesophyll. Spongy mesophyll. Epidermis. Cuticle. The cuticle:. Consists of a waxy material which improves impermeability. It is produced by the epidermis cells.. Lab 14. The Leaves. The . Leaves. are lateral outgrowth of the stem which develop from the meristematic tissues . .. Functions . of Plant . Leaves. Photosynthesis. Transpiration. The exit of water is through the . Anatomy . & Physiology. ivyanatomy.com. . Skin and Its Tissues. An . Organ . is a . group of . two or more tissues that perform a specialized function. Skin (Cutaneous Membrane) . is the largest organ by weight. Part 1:. Integumentary System. The . integumentary. system consists of the . skin. , . hair. , . nails. , and . glands. .. . Functions. : . protection of internal structures (from abrasion & UV light). Dr.Widad.J.H. INTEGUMENTARY SYSTEM . . .. The skin . (also known as cutis ) . covers the entire outer surface of the body. Structurally, the skin consists of two layers which differ in function, histological appearance and their embryological origin. The outer layer or epidermis is formed by an epithelium and is of . The skin – the interface between humans and their environment. Skin is your passport into the world. Skin can decide if you are : . or. criminal. innocent. Skin can decide your race. Skin is the largest organ in the body. Introduction . Organs are composed of two or more kinds of tissues. The skin and its accessory organs constitute the integumentary organ system. Types of Membranes. Serous Membranes. Line body cavities that lack openings to the outside. (Integumentum commune) = Skin and accessory structures Aleš Hampl Integumentum commune = Body coverage Tela subcutanea = Subcutis - Hypodermis Cutis = Skin Epidermis = keratinizing stratified Epidermis. It consist of uniseriate, tangentially elongated cells.. The cells are living, achlorophylous and . vacuolate. The outer walls of the epidermal cells have cuticle to check water loss. Numerous multicellular hairs develop on the epidermis.