For example in the stratified epithelium of the skin. Answer Now and help others. Xylem Gap junctions allow small molecules and structures to pass freely between cells. Content Guidelines 2. There are three types of connective tissue fibers: Classification of connective tissue is based upon two characteristics: the composition of its cellular and extracellular components and its function in the body. Xylem and phloem are examples of complex tissues. There are four basic tissue types defined by their morphology and function: Epithelial tissue is a highly cellular tissue that overlies body surfaces, lines cavities, and forms glands. Know more on different types of tissues and characteristics. It is also known as vascular tissue; Types of complex tissue: I. Xylem. The cells of epithelial tissue have three types of surfaces differentiated by their location and functional specializations: basal, apical, and lateral. The most notable lateral surface structures are junctions. Muscle tissue is excitable, responding to stimulation and contracting to provide movement, and occurs as three major types: skeletal (voluntary) muscle, smooth … Xylem consist of four elements: tracheids, vessels, xylem fibers and xylem parenchyma (Fig. It consists of cells, that originate from mesenchyme, and an extracellular matrix. Loose connective tissue. The cells are living and thin walled. Reviewer: Sieve elements, parenchyma, sclerenchyma(fibers) Food conduction, storage, (support) In same locations as xylem. Epithelial tissue, also referred to as epithelium, refers to the sheets of cells that cover exterior surfaces of the body, lines internal cavities and passageways, and forms certain glands. It provides support to the plants. In vertebrates, bone tissue is a type of connective tissue that supports the entire body structure. Desmosomes can be thought of as spot-welding for epithelial tissues. The complex tissues are heterogeneous in nature, being com­posed of different types of cell elements. It is composed of thin-walled cells and its main function is to conduct prepared food materials, especially sugars and proteins. Adipose cells, or adipocytes, are specialized cells that store fat and synthesize hormones, growth factors, and some inflammatory mediators. The different types of tissues we have discussed until now are all made of one type of cells, which … 3.4 i-ii): Special tissues are structurally modified and specially organized for … A nearly gelatinized ground substance called Wharton’s jelly makes up most of the extracellular matrix between the cells and collagen fibers. Tissues, simple or complex, act together as a unit to accomplish a collective function and are derived from meristems. They are heavily involved in diffusion in the proximal convoluted tubule of the nephron and in the lumen of the small intestines. The main function of xylem is to conduct water and minerals from roots to leaves. The function of xylem is to transport water and minerals from the root to the leaves of plants. Observe how a red blood cell travels from the heart to the lungs and other body tissues to exchange oxygen and carbon dioxide In a circuit through the cardiovascular system, red blood cells transport oxygen from the lungs to the body tissues and transport carbon dioxide from the body tissues to the lungs. Xylem and phloem are examples of complex tissues. Epithelial tissue; Connective tissue; Muscular tissue; Nervous tissue. Nervous tissue exhibits a fluid-filled extracellular space through which ions and neuromediators travel to transmit impulses. Epithelial tissues cover, line, protect, and secrete; these tissues include the epidermis of the integument: the lining of the digestive tract and trachea. Complex tissue: Complex tissue is composed of more than one kind of cells. Simple vs. Complex Tissues. Specialized junctions called hemidesmosomes secure the epithelial cells on the basement membrane. They occur along with phloem to form the vascular bundle. They are located in loose connective tissue either as individual cells or in clusters. A tissue is a group of cells, in close proximity, organized to perform one or more specific functions. Parenchyma is the most common tissue which is morphologically and physiologically simple and unspecialized. These cells are elongated, lignified and provide mechanical strength to the plant body. Connective tissue is the most abundant tissue type in the body. Tracheids are elongated or tube-like dead cell with hard, thick and lignified walls. How the vascular cambium is responsible for secondary growth? Tight junctions form a solid barrier to prevent movement of molecules between adjacent epithelial cells. Smooth muscle tissue is associated with arteries and tubular organs such as the intestinal tract. 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