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Epithelial tissue covers the whole surface of the body. It is made up of cells closely packed and ranged in one or more layers. This tissue is specialised to form the covering or lining of all internal and external body surfaces. Epithelial tissue that occurs on surfaces on the interior of the body is known as endothelium. Epithelial cells are packed tightly together, with almost no intercellular spaces and only a small amount of intercellular substance. Epithelial tissue, regardless of the type, is usually separated from the underlying tissue by a thin sheet of connective tissue; basement membrane. The basement membrane provides structural support for the epithelium and also binds it to neighbouring structures.
Types of Epithelial TissueEpithelial tissue can be divided into two groups depending on the number of layers of which it is composes. Epithelial tissue which is only one cell thick is known as simple epithelium. If it is two or more cells thick such as the skin, it is known as stratified epithelium.Simple epithelium
Simple epithelium can be subdivided according to the shape and function of its cells.
Squamous cells have the appearance of thin, flat plates. The shape of the nucleus usually corresponds to the cell form and help to identify the type of epithelium. Squamous cells, for example, tend to have horizontall flattened, elliptical nuclei because of the thin flattened form of the cell. They form the lining of cavities such as the mouth, blood vessels, heart and lungs and make up the outer layers of the skin.
Also does these things as tissue
Epithelial cells from the skin protect underlying tissue from mechanical injury, harmful chemicals, invading bacteria and from excessive loss of water.
Sensory stimuli penetrate specialised epithelial cells. Specialised epithelial tissue containing sensory nerve endings is found in the skin, eyes, ears, nose and on the tongue.
In glands, epithelial tissue is specialised to secrete specific chemical substances such as enzymes, hormones and lubricating fluids.
Certain epithelial cells lining the small intestine absorb nutrients from the digestion of food.
Epithelial tissues in the kidney excrete waste products from the body and reabsorb needed materials from the urine. Sweat is also excreted from the body by epithelial cells in the sweat glands.
Simple epithelium promotes the diffusion of gases, liquids and nutrients. Because they form such a thin lining, they are ideal for the diffusion of gases (eg. walls of capillaries and lungs).
Ciliated epithelium assists in removing dust particles and foreign bodies which have entered the air passages.
The smooth, tightly-interlocking, epithelial cells that line the entire circulatory system reduce friction between the blood and the walls of the blood vessels.
The anus is made out of a combination of smooth muscle tissue, connective tissue, and epithelial tissue. Smooth muscle tissue helps with the control of bowel movements, while connective tissue provides support and structure, and epithelial tissue lines the inner surface of the anus.
Simple squamous
The tissue that lines all internal surfaces is called epithelial tissue. Epithelial tissue is made up of tightly packed cells that cover and protect organs, and it also plays a role in absorption, secretion, and sensation.
The meninges, which are membranes that envelop the brain and spinal cord, are composed mainly of connective tissue rather than epithelial tissue. Additionally, the synovial membrane, found in joint cavities, is made up of connective tissue and does not contain epithelial cells.
The tissue that makes up most of your skin is Epithelial tissue.
Skin is made up of epithelial tissue. stratified spuamousnerves:)Epithelial.
There is gut epithelial tissue which is associated with the alimentary canal which is an organ. The skin is the largest organ and is also made up of epithelial tissue.
Fat is adipose tissue which is a connective tissue.
An epithelial membrane is a thin layer of tissue that covers organs, lines cavities, and forms the outer layer of the skin. It consists of epithelial cells attached to an underlying connective tissue layer. Epithelial membranes serve to protect, secrete, and absorb substances.
The digestive system is primarily made up of muscular tissue, connective tissue, epithelial tissue, and nervous tissue. Muscular tissue helps with movement of food along the digestive tract, connective tissue provides support and structure, epithelial tissue lines the inner surface for absorption and secretion, and nervous tissue controls and coordinates its functions.
fat layer, epitheremis, dermisTissues of the skin are epithelial tissues and connective tissues.
Epithelial tissue
The walls of the bronchioles are made up of smooth muscle, connective tissue, and epithelial cells.
The anus is made out of a combination of smooth muscle tissue, connective tissue, and epithelial tissue. Smooth muscle tissue helps with the control of bowel movements, while connective tissue provides support and structure, and epithelial tissue lines the inner surface of the anus.
It consists of two cells. The epidermal cells and the guard cells.
Simple squamous
epithelial