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Raneses 1Annejelyn RanesesBIOL 223-005The Case of Will Smithers: To Exhume or not Exhume, that is the Question1.b. Different tissues share a discrete population of functionally and structurally related cells and a surrounding material called the extracellular matrix.2.A tissue is when two or more cells group together to form a specific function for the body. An organ is a group of two or more tissues that come together as a structure that performs a specialized task. In relation to the levels of body organization, tissues make upthe third tier and consist of when cells similar in shape, size, and function combine to perform a function together. The organ level is the fourth tier in the body’s organization and appear when similar tissues form together and perform a function. Epithelial tissues is made to cover the body’s surfaces and internal cavities to protect from stress and other injuries. They also secrete sweat, saliva, and certain hormones through the glands they form. The cells in epithelial tissue are packed tight in layers with no ECM visible. Connective tissues bind, support, and protect the body’s internal features. They also aid inthe transportation of substances throughout the body, referring to blood. These tissue, in contrast to epithelial tissue, have a very prominent ECM and have its cells found sparingly throughout the rest of the tissue.Muscle tissues are designed to contract, voluntary or involuntary, and do not have much ECM between its cells. Nervous tissues are made to generate, send, and receive electrical signals throughout the body. These tissues are composed of unique cells with a cell body, axon and dendrite. 3.a. Epithelial tissue only provides a physical barrier against invading organisms, as there are no immune system cells associated with this tissue type.