Epithelium

1.3.2 Papillary dermis The papillary dermis is the smaller of the two layers in the dermis, and is located between the epidermis and the reticular dermis. The papillary dermis is approximately 300-400 µm deep, depending on the age and anatomical location.22 The upper outermost layer of the papillary dermis is arranged into protruding structures called the dermal papillae. The dermal papillae contains microvascular and neural components to support the epidermis. The dermal papillae increase the…

Structure of Tight Junctions and their Dynamic Functions in Health and Disease Tight junction (TJ) discovery in the 1960s helped determine the nature of paracellular transport while the discovery of their constituting proteins subsequently improved understanding of TJs’ dynamic structure. Their role can be appreciated particularly in epithelial cells and when their formation is compromised; I aim to briefly explore the cause of Crohn’s disease to illustrate this. Furthermore, I will outline the…

Tissues are a group of cells with a common structure and function. There are four main tissues in the body. Epithelial, connective, muscular, and nervous tissue are the four main types that make up the human body. Epithelial tissue lines body cavities, hollow organs, and ducts. It covers the body surfaces and forms glands. Connective tissue binds organs together, stores energy reserves as fat, and provides immunity. It protects and supports the body and its organs. Muscular tissue generates the…

The retinal pigment epithelium (RPE) is very a important part of the eye; It is responsible for absorption of scattered light, the visual cycle and phagocytosis of photoreceptor outer segment membranes. The protein RPE65 is normally abundantly made in the RPE, unless there is a mutation in the RPE65 gene, caused by a deletion of 4 base pairs. This deletion causes a frame shift and also an early stop on the protein, so the protein is shorter and does not function properly. The mutated gene is…

Keratinized Stratified squamous epithelium are cells on the surface of the pinna of the ear in the epidermis. These are structurally flat cells, and although they are part of the skin surface layer they are no longer active cells by the lack of blood supply. They are pack of a keratin proteins, which main purpose is to make our skin waterproof from hazard chemicals. These dead cells are constantly deteriorating from the surface of the skin. The cells on the base layer are really cuboidal shape.…

Organ Trail WebQuest Worksheet Epithelium-Tissue that covers the whole surface of the body.It has alot of cells in one or more layers. Describe the four types of tissues. Function- Epithelium tissue covers the whole surface of your body and it also protects your skin. Characteristics-The Characteristics traits covers and lines and all body surfaces. The cells are packed together and it the tissue can repair itself. Classification -The classification types are squamous,cuboidal,…

epithelial layer. The epithelial layer is again in two forms namely pigmented epithelial layer (PE) and non-pigmented epithelial layer (NPE). The anterior portion of CB continues with iris epithelium, posteriorly NPE continues with neurol retina and PE with retinal pigment epithelium. The important function of ciliary epithelium is to produce aqueous humor. Aqueous humor is required to build up the intraocular pressure (IOP), that maintains the eye shape, and also nourishes avascular eye…

cells has a potential for better treatment approaches to asthmatic conditions. We show that compressive stress levels in asthmatic airways can lead to sustained bronchospasm due to mechanical-stress regulated release of spasmogens by the airway epithelium, even upon removal of external stimuli that initially triggered the…

rings of matrix. 1] There are four main types of tissues; epithelium, connective, nervous and muscle, inside of every tissue type, there are varieties present. In image 1, 2 and 3 are of epithelium tissues that create a barrier between the outside environment and the body inside called skin. The skin is the largest organ and counteracts micro-organisms, living beings, microbes and different hazardous particles entering the body. Epithelium tissue also lines…

that is responsible for the churning function of the stomach that aids in its ability to digestive and move food from the stomach into the small intestine. The gastroesophageal junction is the junction between the esophagus and the stomach. The epithelium changes from…