Distinguish among the four tissue types found in the human body. Provide an example of each type with its function and location. Epithelial tissue covers the body surface and forms the lining for most internal cavities. The major function of epithelial tissue includes protection secretion absorption and filtration. The skin is an organ made up of epithelial tissue which protects the body from dirt dust bacteria and other microbes that may be harmful. Cells of the epithelial tissue have different shapes as shown on the student?s worksheet. Cells can be thin flat to cubic to elongate. ConnectiveAnalyze The Anatomical Structure Of Ten tissue is the most abundant and the most widely distributed of the tissues. Connective tissues perform a variety of functions including support and protection. The following tissues are found in the human body ordinary loose connective tissue fat tissue dense fibrous tissue cartilage bone blood and lymph which are all considered connective tissue. There are three types of muscle tissue: skeletal smooth and cardiac. Skeletal muscle is a voluntary type of muscle tissue that is used in the contraction of skeletal parts. Smooth muscle is found in the walls of internal organs and blood vessels. It is an involuntary type. The cardiac muscle is found only in the walls of the heart and is involuntary in nature. Nerve tissue is composed of specialized cells which not only receive stimuli but also conduct impulses to and from all parts of the body. Nerve cells or neurons are long and string-like. Distinguish among five different types of connective tissue with examples of functions and location within the body. Adipose fatty tissue; type of loose connective tissue that stores energy insulates and cushions the body Fibrous Tissue composed of bundles of collagenous white fibers between which are rows of connective tissue cells. Bone tissue Most rigid connective tissue internally supports body structures very active tissue heals much more rapidly than cartilage cartilage tissue Dense flexible tissue similar to bone tissue blood tissue Consists of blood cells surrounded by nonliving fluid matrix called plasma. Funcion: transport vehicle for cardiovascular system carrying nutrients wastes respiratory gases and many other subs thru body hemopoietic tissue Produces blood cells that are added to the circulating blood removes worn out blood cells from the blood stream red bone marrow lymphatic tissue yellow bone marrow Analyze five different types of epithelial tissue with examples of functions and location within the body. Simple squamous-single layer of thin flat many-sided cells each with a central nucleus. It lines internal cavities the heart and all the blood vessels. Also lines parts of the urinary respiratory and male reproductive tracts. Stratified squamous-consists of many layers of cells. Innermost layer produces cells that are first cuboidal or columnar in shape but as cells push toward the surface they become flattened and begin to accumulate a protein called keratin and eventually die. Keratin makes the outer layer of epidermis tough protective and able to repel water. The linings of the mouth throat anal canal and vagina are examples of stratified epithelium. The outermost layer of cells surrounding the cavity remains soft moist and alive. Simple cuboidal-single layer of cube-shaped cells each with a central nucleus. Found in tubules of the kidney and in the ducts of many glands where it has a protective function. It also occurs in the secretory portions of some glands where the tissue produces and releases secretions. Simple columnar-single layer of tall cylindrical cells each with a nucleus near the base. This tissue which lines the digestive tract from the stomach to the anus protects secretes and allows absorption of nutrients. Pseudo stratified ciliated columnar-appears to be layered though actually all cells touch the basement membrane. Many cilia are located on the free end of each cell. In the human trachea the cilia wave back and forth moving mucus and debris up toward the throat so that it cannot enter the lungs. Smoking destroys these cilia but they will grow back if smoking is discontinued.”
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