What Is Microvilli-Epithelial Tissue Functions?

It is made up of either liquid, solid, or connective tissue, within the matrix there are many types of connecting fibres, such as collagen and elastic fibres.

• *Describe the 3 main types of cells and the 3 main types of fibers found in connective tissue? Reference Table 5.6.

The skeletal system is made up of cartilage and bone. Both bone and cartilage are connective tissues, that is, they are composed of cells in a matrix with intracellular fibers. Just imagine connective tissue as a gelatin salad with grapes and coconut. The grapes would represent cells, the gelatin the support material for matrix, and the pieces of coconut the intracellular fibers. By changing the amounts of each ingredient and adding extra substances, we can produce a material that is very hard like bone and can withstand weight or softer like cartilage which can be used as a cushioning material.

58) Connective tissues that possess a large quantity of collagen fibers often provide the framework for organs such

The skeletal system is made up of cartilage and bone. Both bone and cartilage are connective tissues, that is, they are composed of cells in a matrix with intracellular fibers. Just imagine connective tissue as a gelatin salad with grapes and coconut. The grapes would represent cells, the gelatin the support material for matrix, and the pieces of coconut the intracellular fibers. By changing the amounts of each ingredient and adding extra substances, we can produce a material that is very hard like bone and can withstand weight or softer like cartilage which can be used as a cushioning material. In this exercise, we will examine a fresh raw chicken bone to study bone

Thinner, more darkly stained elastic fibers composed of the protein elastin can also be seen. The principal type of cells seen are lightly-staining fibroblasts that secrete the matrix materials.

Epithelial-mesenchymal transition (EMT) is a cellular process that is essential for normal processes in many organisms, including embryonic development and wound healing, and is recapitulated in human disease, contributing to organ fibrosis and cancer progression (Thiery et al. 2009; Yang and Weinberg 2008). EMT describes the conversion of a cell with an epithelial phenotype to one with mesenchymal characteristics and can be a partial or complete transformation. Epithelial cells form the borders of tissues and organs, and are characterized by apical-basal polarity, contact with a basement membrane, and strong adherence to other epithelial cells through intercellular junctions including adherens junctions, tight junctions, and desmosomes. Conversely, mesenchymal cells have front-rear polarity and generally lack cell-cell contact, allowing them to be motile. During human embryonic development, EMT is essential for the formation of a variety of tissues, including mesoderm, neural crest, somites, palate, pancreas, liver, reproductive tracts, and heart valves (Thiery et al. 2009; Yang and Weinberg 2008). After development, partial EMT also contributes to wound healing (Thiery et al. 2009). However, EMT can also play a more insidious role by factoring into tumour progression.

In this assignment I’m going to talk about the structure of the main tissues which are found within the body as well as what their role is in the terms of two named organs of the body. Tissues are a collection of similar cells that group together to carry out a specific function within the body. There are four different types of tissue found in the human body which include; epithelial tissue; connective tissue; muscle tissue and nerve tissue.

The cells of the connective tissue pictured below in a cross section from the trachea are specialized for fat storage and do not form ground substance or fibers.  On prepared slides, this type tissue appears somewhat like a fish net with white spaces connected together in a network.  The cytoplasm and nucleus have been pushed to one side by a single, large, fat-filled vacuole that occupies the center of the cell.

The epithelium of the skin is keratinized stratified squamous epithelium; the stratum basale (the bottom layer) is responsible for constantly making new cells, so when the top layer gets damaged or injured there are still several layers underneath it, these layers can replace the old ones easily. Having a single layer of columnar cells on the skin will not be an advantage because those layers don’t have protection and once those layers are injured there is nothing to replace them. Therefore the advantage of having squamous epithelium is mainly, protection and

Flagella- The Flagella is the “tail” of the bacteria which helps it move around the body.

Cells line most organs, for example, the stomach and small digestive system, kidney, and pancreas. They additionally line the throat. Cells are likewise found in ducts and glands, similar to the bile duct and sailvary organs. Epithelia can practice to go about as tactile receptors. They frame taste buds, line the nose, and are in the ear. Additionally they can be found in the eye. Female regenerative organs are lined with ciliated epithelial cells as well. The skin is also made of epithelial cells. Its striated layers show the broad morphology of epithelia. Narrow beds are made of epithelium. Epithelia are the first kind of cell to separate in the developing life (Bernd,

There is another type of dense fibrous connective tissue called aponeurosis. Its tendon like and helps anchor and move muscles. The structure is similar to tendons and ligaments, there are bundles of collagenous fibers with lots of fibroblasts (“Aponeurosis”, 2015). The fibers run in several directions. In the knee joint the interosseous membrane of the leg is an aponeurosis that creates a space for the vessels to run through.

The skeletal system is made up of bones and joints. Bones are a dry dense tissue that is composed of calcium phosphorous and organic matter. The bones are protected and covered by a layer of fibrous connective tissue membrane called the periosteum (Brown, et al., 2015, p. 1547). There are two basic types of bone tissue: Compact Bone and Spongy Bone. Compact bones are dense smooth bones, while Spongy bones are composed of small needle-like pieces of bones and open space. Bones are then categorised according to the shape of the bone into four groups: long, short, flat and irregular. Long bones characteristically are typically longer then they are wide and generally have a shaft with heads at either ends e.g. the humerus. They are mainly compact bones. Short bones

Osseous tissue contains specialized cells, cell products, and a fluid matrix. The distinctive solid, stony nature of bone results from the deposition of calcium salts within the matrix. Crystals of calcium phosphate account for almost two-thirds of the weight of the bone. The majority of