Membrane And Connective Tissues And Their Roles

• *Describe the structure and list the functions of the various epithelial tissues, including glandular epithelium. Reference Table 5.5.

This series of courses covers the structure of the body’s parts – their forms and how they are organized – and their function, anatomical and disease state terminology.

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.

Non-ciliated simple columnar epithelial tissue is found on the lining digestive tract, which is the stomach, gall bladder and the excretory ducts of some glands. It is a tube, which transfers food to the digestive organs. It also contains a nucleus at its base, has a single layer of cells however are not ciliated; they do not contain tiny hairs. It also has microvilli to increase the surface area and to make the absorption more effective, the microvilli can also be referred to as the brush border due to its hairy appearance.

Describe the structure and location of the proximal convoluted tubule, loop of Henle, distal convoluted tubule, collecting duct, and papillary duct.

The primary role of the flagellum is locomotion, but it also often has function as a sensory organelle, being sensitive to chemicals and temperatures outside the cell.

These are found all over the body and are essential for the exchange of materials between the blood and other body cells.

The nostrils and nasal hairs, nasal cavity, paranasal sinuses, oral cavity, larynx, pharynx and the epiglottis are all part of the upper respiratory tract. The upper respiratory tract is responsible for the conduction, filtering, protection, warming and moistening of air for inspiration. The tissues found in the upper tract of the respiratory system are stratified squamous cells, pseudostratified ciliated columnar cells, and there are also mucosa (goblet cells). The goblet cells produce the mucus required for capture and expulsion of foreign materials. This is achieved by trapping the foreign particles in the mucus which the cilia move towards the pharynx where it is either coughed up or swallowed, keeping the conduction pathway mostly free of unwanted matter. The epiglottis at the top of the larynx is an important structure in the respiratory system as during swallowing the epiglottis closes over the trachea preventing food/drink/mucus/saliva into the airways. Once swallowing is complete the epiglottis flap relaxes allowing air to flow freely into the lower section of the respiratory system through the multiple layers of c-shaped cartilage structure called the trachea. The c-shaped cartilage is to prevent the airways from collapsing. The

simple squamous is a type of epithelial tissue. it is a individual layer of thin cells with flattened, rounded, and disc-shaped central nuclei. it is the simplest of the epithelia. this type of epithelial tissue lines several areas in the body such as: blood vessels, skin, alveoli, glomeruli, pericardial, pleural, peritoneal cavity, and alveolar as it assist the procedure of diffusion, filtration, and osmosis.

About one third of the testicular parenchyma is taken up by the loose connective tissues surrounding the seminiferous tubules. Extracellular matrix is a major component of the intertubular tissue with a lesser proportion of Leydig cells, blood vessels, macrophages and connective tissue cells.(100)

Simple Epithelial tissues are composed of only one layer of cells, while stratified tissues are composed of more than one layer of cells. Squamous tissues are flat as compared to cuboidal or cube shaped tissues. The final tissue is called columnar, and these cells have a column like shape.

-Connective Tissue: few cells dispersed within an abundance of extracellular material, connects, supports, and anchors various body parts. Cells produce specific structural molecules that they release into the extracellular spaces between the cells.

body via the blood. The airways and air sacs are the vehicle through which the lung performs its

Cuboidal- cubed or squarish shaped, has a single nucleus located in the middle. The simple cuboidal tissue can be found in the lines of kidney tubules and glands it’s function is absorption, secretion and protection. The stratified cuboidal tissue is found in the lines ducts of sweat glands, it’s job is to secrete water & ions.

insects and mammals. Because of this the gas exchange system is located on the outside of the