In this assignment I’m going to talk about the structure of the main tissues which are found within the body as well as what their role is in the terms of two named organs of the body. Tissues are a collection of similar cells that group together to carry out a specific function within the body. There are four different types of tissue found in the human body which include; epithelial tissue; connective tissue; muscle tissue and nerve tissue.
The first type of tissue found in the human body is epithelial tissue. These types of tissue are found covering the whole surface of the body, lining of cavities, hollow organs and tubes. The cells a very closely packed and are arranged in one or more layers, they are composed of several layers called Compound Epithelial or a single layer called Simple. Epithelial cells are packed together with hardly any intercellular spaces with a small amount of intercellular substance known as matrix. The bottom layer of the cells are usually attached to connective tissue called the basement membrane which provides structural support and is used to bind the cells to neighbouring structures. The structure of epithelial tissue is related to the function it carries out which include; protection; secretion and absorption.
Simple epithelium consists of a single layer of identical cells, which are divided into three main types. The types are named depending on their shape which alters according to the functions they carry out. The more the tissue gets used, the taller the cells. Simple epithelium is usually found on absorptive or secretory surfaces, where it helps to speed up these processes due to the single layer of cells. Simple Epithelium can be squamous, cuboidal, columnar or ciliated.
Squamous cells are a single layer of flat cells which contain a nucleus that forms a lump in the centre. They fit closely together forming a thin and smooth layer of membrane across which allows
References: Beryl Stretch (2010), Health and Social Care, Level three, BTEC National, Book one. Anne Waugh and Alison Grant (2010), Ross and Wilson Anatomy and Physiology in health and illness, 11th edition. Dr, Kenneth R. Chien (2012) Working tissue inside the heart. Available at: http://www.boston.com/yourlife/health/diseases/articles/2006/11/23/Working_tissues_inside_the_heart/ [Accessed 15th December 2012]