Understanding Types of Connective Tissue - Biology

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Question

Which of the following is not a type of connective tissue?

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Answer

There are four main categories of tissue: connective tissue, epithelial tissue, nervous tissue, and muscle tissue. Connective tissue is classified by loosely associated cells in an abundant medium, generally used to fill spaces and connect structures to one another within the body. Collagen fibers are particularly abundant in connective tissue. Adipose cells (fat), blood, cartilage, and bone are all specific types of connective tissue. Extracellular matrix is generally also considered connective tissue, but can vary in composition to some extent by location and includes loose connective tissue and dense connective tissue.

In contrast, epithelial tissue serves to line and protect regions of the body form the external environment. Any region of the body that is directly or indirectly connected to the environment is lined with epithelial cells, including the skin, digestive tract, respiratory tract, and excretory tract. Since material from the external environment (food) can enter the stomach, we know that the stomach lining must be made of epithelium.

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