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Outline the structure of the main tissues of the body

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Introduction

´╗┐Samantha Oakes Assignment 2: Tissue types of the body. P2: Outline the structure of the main tissues of the body. 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. ...read more.

Middle

It also prevents bone from being too brittle which means it?s less likely to fracture. Also bone has considerable capacity for growth in the first two decades of life and redevelopment throughout life. There are two types of bone that can be identified by the naked eye which are: compact bone that appears solid or dense and spongy or cancellous bone which has a honeycomb appearance. Bone is created to bear weight by limbs bones being hollow. The bone is also used to protect weaker and more delicate tissues such as the brain and lungs. Areolar tissue is the most common type of connective tissue in the body. It is a sticky white material that binds muscle groups, blood vessels and nerves together. The matrix is semi fluid which contains many fat cells, mast cells and macrophages separated by elastic and collagen fibres secreted by the cells found in this loose connective tissue. It is found in almost every part of the body with the elastic fibres providing elasticity and tensile strength. Areolar tissue offers support and helps to connect other tissues it surrounds such as under the skin, between muscles and blood vessels and nerves. Adipose tissue is a technical term used for fatty tissue. It is a variation of areolar tissue, in which it consists of fat cells, which contain large fat globules in a matrix of areolar tissue. ...read more.

Conclusion

The pia is a thin, mesh like meningeal envelope that is directly attached to the brain. It allows blood vessels to pass through and nourish the brain. The meninges are known as the blood brain barrier. The blood vessels are made up of smooth tissue. The heart is part of the cardiovascular system, it pumps blood around the body. It also carries vital materials around our body to help it function as well as removing wastes such as carbon dioxide. The heart is mainly made up of cardiac tissue, which is found in the four chambers of the heart: right and left atrium and right and left ventricle. These tissues perform the pumping of the heart, they are self contracting, automatically regulated and contract in a rhythmic fashion. This pumps blood around the entire body helping to oxygenate muscles and delivers the vital materials. The heart also consists of smooth muscle tissue, which is found in the walls of large blood vessels. Smooth muscle tissue provides stability and flexibility so the large arteries can contract and expand. This helps to maintain pressure of blood volume. Smooth muscle also allows the flow of blood to the organs change for example during the exercise, the arteries to the muscles that are being used relax to allow more blood through so more oxygen is supplied. It also contains epithelial cells, which line the chambers and vessels. They stop parts of blood from moving to the muscle as well as helping to prevent blood clots. ...read more.

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