Humans and animals are the complex organisms made up of collection of cells to perform specific functions. These collections of cells are often called the tissues. Tissues arise from the embryonic origin that performs a specific physiological and structural role in an organ. Tissues perform specific functions namely nerve signaling and nutrient digestion. There are four types of primary tissues namely epithelial, connective, nervous, and muscular tissues.

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Chapter 5.4, Problem 18BYGO

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Humans and animals are the complex organisms made up of collection of cells to perform specific functions. These collections of cells are often called the tissues. Tissues arise from the embryonic origin that performs a specific physiological and structural role in an organ. Tissues perform specific functions namely nerve signaling and nutrient digestion. There are four types of primary tissues namely epithelial, connective, nervous, and muscular tissues.

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