types of tissue

The two broad categories of tissue membranes in the body are (1) connective tissue membranes, which include synovial membranes, and (2) epithelial membranes, which include mucous membranes, serous membranes, and the cutaneous membrane, in other words, the skin. This synovial fluid readily exchanges water and nutrients with blood, as do all body fluids. 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. Connective tissue, as its name implies, binds the cells and organs of the body together and functions in the protection, support, and integration of all parts of the body. It acts as a thermal insulator and also energy store. Blood is called a liquid connective tissue. Each germ layer is identified by its relative position: ectoderm (ecto- = “outer”), mesoderm (meso- = “middle”), and endoderm (endo- = “inner”). The Cardiovascular System: Blood, Chapter 19. This cilium moves the mucus towards the throat. Epithelial tissue is made of layers of cells that cover the surfaces of the body that come into contact with the exterior world, line internal cavities, and form glands. It is present as linings of organs like the. There is one more type of epithelium i.e. The Peripheral Nervous System, 13.4 Relationship of the PNS to the Spinal Cord of the CNS, 13.6 Testing the Spinal Nerves (Sensory and Motor Exams), 14.2 Blood Flow the meninges and Cerebrospinal Fluid Production and Circulation, 16.1 Divisions of the Autonomic Nervous System, 16.4 Drugs that Affect the Autonomic System, 17.3 The Pituitary Gland and Hypothalamus, 17.10 Organs with Secondary Endocrine Functions, 17.11 Development and Aging of the Endocrine System, Chapter 18. A tissue membrane is a thin layer or sheet of cells that either covers the outside of the body (e.g., skin), lines an internal body cavity (e.g., peritoneal cavity),  lines a vessel (e.g., blood vessel),  or lines a movable joint cavity (e.g., synovial joint). A cutaneous membrane is a multi-layered membrane composed of epithelial and connective tissues. Unlike the loose connective tissue, this has more fibers and less number of cells. This epithelium is a single layer of identical cells. The zygote is described as omnipotent because it ultimately gives rise to all the cells in your body including the highly specialized cells of your nervous system. They are formed during birth and last till death. Embryonic Origin of Tissues and Major Organs. Figure 2 shows the types of tissues and organs associated with the each of the three germ layers. The zygote, or fertilized egg, is a single cell formed by the fusion of an egg and sperm. The primary tissue types work together to contribute to the overall health and maintenance of the human body. The four types of tissues in the body are epithelial, connective, muscle, and nervous. Mucus, produced by  uniglandular cells and glandular tissue, coats the epithelial layer. Note that epithelial tissue originates in all three layers, whereas nervous tissue derives primarily from the ectoderm and muscle tissue derives from the mesoderm. The connective tissue membrane is formed solely from connective tissue. Three serous membranes are found lining the thoracic cavity; two membranes that cover the lungs (pleura) and one membrane that covers the heart (pericardium). This type of tissue is present in the urinary bladder. These tissues together form the organs in the body. This epithelium is thin and offers the least resistance for the transfer of molecules from one side to another. It helps to protect the nerve cell from damage. This is formed by osteocytes (bone cells) along with wth collagen fibers inorganic salts like phosphate and calcium. These membranes line the coelomic cavities of the body, that is, those cavities that do not open to the outside, and they cover the organs located within those cavities. The epithelial and connective tissues are discussed in detail in this chapter. This tissue is found in lymph nodes and organs of the lymphatic system. Nervous tissue is also excitable, allowing for the generation and propagation of electrochemical signals in the form of nerve impulses that communicate between different regions of the body (Figure 4.1.1). View this slideshow to learn more about stem cells. In most other types of stratified epithelium, the upper layer is non-keratinized. is glandular epithelium which is present in glands.

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