4.1 Types of Tissues - Anatomy and Physiology _...

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1/26/22, 12:01 PM4.1 Types of Tissues - Anatomy and Physiology | OpenStax1/5Learning ObjectivesBy the end of this section, you will be able to:Identify the four main tissue typesDiscuss the functions of each tissue typeRelate the structure of each tissue type to their functionDiscuss the embryonic origin of tissueIdentify the three major germ layersIdentify the main types of tissue membranesThe termtissueis used to describe a group of cells found together in the body. The cellswithin a tissue share a common embryonic origin. Microscopic observation reveals that thecells in a tissue share morphological features and are arranged in an orderly pattern thatachieves the tissue’s functions. From the evolutionary perspective, tissues appear in morecomplex organisms. For example, multicellular protists, ancient eukaryotes, do not have cellsorganized into tissues.Although there are many types of cells in the human body, they are organized into four broadcategories of tissues: epithelial, connective, muscle, and nervous. Each of these categories ischaracterized by specific functions that contribute to the overall health and maintenance of thebody. A disruption of the structure is a sign of injury or disease. Such changes can bedetected throughhistology, the microscopic study of tissue appearance, organization, andfunction.The Four Types of TissuesEpithelial tissue, also referred to as epithelium, refers to the sheets of cells that cover exteriorsurfaces of the body, line internal cavities and passageways, and form certain glands.Connective tissue, as its name implies, binds the cells and organs of the body together andfunctions in the protection, support, and integration of all parts of the body.Muscle tissueisexcitable, responding to stimulation and contracting to provide movement, and occurs asthree major types: skeletal (voluntary) muscle, smooth muscle, and cardiac muscle in theheart.Nervous tissue

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Term
Summer
Professor
Bianca Gilyot
Tags
main tissue types

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