What type of tissue is serous membrane

Each serous membrane is composed of a secretory epithelial layer and a connective tissue layer underneath. Other parts of the body may also have specific names for these structures. For example, the serosa of the uterus is called the perimetrium. The pericardial cavity surrounding the heart , pleural cavity surrounding the lungs and peritoneal cavity surrounding most organs of the abdomen are the three serous cavities within the human body.

It should be noted that while serous membranes have a lubricative role to play in all three cavities, in the pleural cavity it has a greater role to play in the function of breathing. The serous cavities are formed from the intraembryonic coelom and are basically an empty space within the body surrounded by serous membrane. Early in embryonic life visceral organs develop adjacent to a cavity and invaginate into the bag-like coelom.

Therefore each organ becomes surrounded by serous membrane - they do not lie within the serous cavity. The layer in contact with the organ is known as the visceral layer, while the parietal layer is in contact with the body wall.

All serous membranes found in the human body formed ultimately from the mesoderm of the trilaminar embryo. The trilaminar embryo consists of three relatively flat layers of ectoderm, endoderm also known as "entoderm" and mesoderm.

This synovial fluid readily exchanges water and nutrients with blood, as do all body fluids. The epithelial membrane is composed of epithelium attached to a layer of connective tissue, for example, your skin. The mucous membrane is also a composite of connective and epithelial tissues. Sometimes called mucosae, these epithelial membranes line the body cavities and hollow passageways that open to the external environment, and include the digestive, respiratory, excretory, and reproductive tracts.

Mucous, produced by the epithelial exocrine glands, covers the epithelial layer. A serous membrane is an epithelial membrane composed of mesodermally derived epithelium called the mesothelium that is supported by connective tissue. These membranes line cavities that do not open to the outside, and they cover the organs located within those cavities.

The next level of organization is the organ, where several types of tissues come together to form a working unit. Just as knowing the structure and function of cells helps you in your study of tissues, knowledge of tissues will help you understand how organs function. The epithelial and connective tissues are discussed in detail in this chapter.

Muscle and nervous tissues will be discussed only briefly in this chapter. Embryonic Origin of Tissues The zygote, or fertilized egg, is a single cell formed by the fusion of an egg and sperm. After fertilization the zygote gives rise to rapid mitotic cycles, generating many cells to form the embryo.

The first embryonic cells generated have the ability to differentiate into any type of cell in the body and, as such, are called totipotent , meaning each has the capacity to divide, differentiate, and develop into a new organism. As cell proliferation progresses, three major cell lineages are established within the embryo.

As explained in a later chapter, each of these lineages of embryonic cells forms the distinct germ layers from which all the tissues and organs of the human body eventually form. Note that epithelial tissue originates in all three layers, whereas nervous tissue derives primarily from the ectoderm and muscle tissue from mesoderm. View this slideshow to learn more about stem cells. How do somatic stem cells differ from embryonic stem cells? A tissue membrane is a thin layer or sheet of cells that covers the outside of the body for example, skin , the organs for example, pericardium , internal passageways that lead to the exterior of the body for example, abdominal mesenteries , and the lining of the moveable joint cavities.

There are two basic types of tissue membranes: connective tissue and epithelial membranes [link]. Connective Tissue Membranes The connective tissue membrane is formed solely from connective tissue.

These membranes encapsulate organs, such as the kidneys, and line our movable joints. A synovial membrane is a type of connective tissue membrane that lines the cavity of a freely movable joint. For example, synovial membranes surround the joints of the shoulder, elbow, and knee. Fibroblasts in the inner layer of the synovial membrane release hyaluronan into the joint cavity. The hyaluronan effectively traps available water to form the synovial fluid, a natural lubricant that enables the bones of a joint to move freely against one another without much friction.

This synovial fluid readily exchanges water and nutrients with blood, as do all body fluids. The epithelial membrane is composed of epithelium attached to a layer of connective tissue, for example, your skin.

To be reviewed Information Comment. Uploaded by: opgobee. To be reviewed. Status: to be reviewed. The pericardium, pleura and peritoneum are serous membranes. MORE 0. Educational level. User comments.