Animal tissues are highly specialized to perform specific functions, and their structure is closely related to their function. For example:
Muscle tissue: Muscle cells have long, fiber-like structures that allow for contraction and movement. Their ability to contract and generate force is critical for movement, posture, and maintaining body functions.
Nervous tissue: Neurons are specialized cells with long extensions (axons) that transmit electrical impulses over long distances, enabling communication within the body. The structure of neurons allows for rapid signal transmission and coordination of bodily functions.
Epithelial tissue: Epithelial cells are tightly packed to form protective layers that cover surfaces, line cavities, and form glands. Their structure allows them to act as a barrier against pathogens and prevent dehydration while facilitating absorption and secretion.
Connective tissue: Cells in connective tissue are dispersed in an extracellular matrix, which provides structural support and flexibility. For example, bone tissue has a rigid structure for support, while adipose tissue stores energy and provides insulation.