Parvana Huseinova P2- The main tissue types of the body and the role these play in tow named organs in the body

Parvana Huseinova Epithelial Tissue What is epithelial tissue? this is when the tissue covers the surface of the body. This is made up with cells that are closely combined and have more than one layer. It covers the lining or external and internal surfaces of the body. The epithelial tissues are very tight and have no space between them and if they do it is something really small. The epithelial tissue helps protect underlying tissue from harmful chemicals bacteria invading and also water loss. There are two parts to the epithelial tissue simple and compound. Simple is a single layered tissue which rest on the bottom of the membrane. Compound is when there is more than 2 layers and the deepest layer is at the bottom of the membrane.

Parvana Huseinova Simple Cuboidal Epithelium. Cuboidal epithelium are square or cuboidal shape. The cells have spherical nucleus in the centre. It is found in glands and the lining of the kidney and also creates a covering for the ovaries. This layers organs to help protect them.

Parvana Huseinova Simple Columnar Epithelium Columnar epithelium is usually in a Colum shape. It is found in the lining of the stomach and intestines. Also in the throat it helps push the mucus to the top of your throat to trap out mucus. The main function of the columnar is the protect. It makes a barrier in the stomach and intestines to trap out bacteria getting in.

Parvana Huseinova Simples squamous epithelium. Squamous epithelium is a thin flat square shape. They are tightly held together. The simple squamous epithelia helps to decide what is able to move from the lumen and into the bloodsteam. It is found in the mouth heart and lungs.

Parvana Huseinova Simple ciliated epithelium is a rectangle shape with and it has lots of hairs on top which is called the cilia. Ciliated epithelial cells are found in the tracheal and bronchial. It helps keep away mucus. Simple Ciliated Epithelium

Parvana Huseinova Compound keratinized epithelium This refers to the out layer of the skin cells when they become hard and die. This layer protects the tissues underneath and it stops substances passing in. keratinized epithelium is found in animal cells.

Parvana Huseinova Muscle Tissue Cardiac muscle- this is found in the heart. It is self controlling. It is striated. Also it is fast and powerful. Skeletal muscle- it is attacked to the skeleton. It is striated for pulling and is fast and powerful. It is cells from fibres with several nuclei. It is voluntary. Smooth muscle- they are found in blood vessels, the stomach, intestines, and bladder. Smooth muscles are involuntary. Its is slow.

Parvana Huseinova Connective tissue Blood- it transports oxygenated and deoxygenated blood in and around the body. Cartilage- is a form of connective tissue, it is a tough flexible tissue, it provides support and structure for the body. It Is found in bones of the body. Bone- bones help support the body and protect organs. Areola- is an elastic fiber cell. It is strong enough to bind tissue types together but soft and still provides cushioning. It is found in the nipple and around the eye. Adipose- found in mammals, it is fat that helps cushion the body.

Parvana Huseinova Nervous Tissue These are cells that help you sense and respond to changes in the environment like light, pressure and chemicals in food. There are two types of nervous tissues. Neurones- they carry information from the brain around the body. It signals your brain when you want to do something and you get a fast response. This called a reflex action.