Epithelium

in 2020[1] and places vast socioeconomic burden. Degeneration of retinal pigment epithelium (RPE) is believed to play central roles in AMD pathogenesis. RPE is a monolayer of highly pigmented cuboidal cells residing between the photoreceptors (PRs) and Bruch’s membrane. One RPE cell serves around thirty photoreceptors in terms of supporting the visual cycle and phagocytosis of outer segments[2]. As a layer of epithelium, RPE cells selectively transport substances across the blood-retinal-barrier (BRB)

tonsils from each other: their position, type of the epithelium and the number of crypts3. Tonsil Position Type of epithelium Crypts Palatine In the lateral walls of the oral part of the pharynx. Stratified squamous non-keratinising. 10-20 in number. Pharyngeal In the midline on the roof of the nasopharynx. Ciliated pseudostratified columnar epithelium, as well as some patches of stratified squamous epithelium. Numerous folds of pharyngeal epithelium, not real crypts. Lingual At

Comparing and contrasting loose Connective tissue (figure c) and simple cuboidal epithelial tissue (figure b) Commonalities in the structures and functions of loose connective tissue and simple cuboidal epithelial tissue The cells in simple cuboidal epithelium have a nucleus. The cells in loose connective tissue also have nuclei. Although the loose connective tissue and simple cuboidal

assembled in a different formation. For example, the cells in the epithelial tissue are joined closely together with little material in between them. There are different types of epithelium tissues, including the simple epithelium and stratified epithelium. A simple epithelium has a single layer of cells and a stratified epithelium has multiple layers of cells. Just within the epithetical tissue, the cells connect to each other in a different structure

Tissues are groups of cells with a common structure and function. There are four main tissues in the body which are epithelium, muscle, connective tissue and nervous tissue. Epithelium functions are It protects us from the outside world. For example, the skin, absorbs the stomach and gut, filters the kidney, and forms glands traits. It closely attached to each other forming a protective barrier, has no blood vessels but can soak up nutrients from blood vessels in connective tissue underneath, can

The cornea is part of the ocular surface system and is of vital importance to maintain its slightly dehydrated state (Gipson, 2007). The cornea consists of layered structures as shown in Figure 3. Corneal epithelium consists of three layers of superficial, wing and basal cells and is the main refractive site of the eye and is constantly bathed by water (tears) secreted from lacrimal glands (Schey et al, 2014). Keratocytes are scattered among a network of collagen

1- Mucosa or mucosal membrane; the type of mucosal membrane varies depend on the location within the GI tract. For example, the mucosa of the oesophagus is composed of tough and stratified epithelium. The mucosa of the rest of the tract is a delicate layer of simple columnar epithelium. 2- Submucosa; is a connective tissue layer that lies just bellow the mucosa. It contains many blood vessels, lymphatic vessels and nerves. 3- Muscularis; two or three layers of smooth muscle tissue make the muscularis

Recent advancement in periodontal regeneration Periodontology . St. Moath Riad Saifi . Introduction :  Regenerative periodontal treatment involves systems which are especially intended to reestablish those parts of the tooth-supporting structures which have been lost because of periodontitis or gingival injury. The expression "recovery" is characterized as a recreation of lost or harmed tissues in a manner that both the first structures and their capacity are totally reestablished. Strategies

Understanding Development of Emphysema through Imaging Started in 2012 when I was accepted to the University of Maine, in the school of Biology and Ecology. I had envisioned myself as a medical professional or conducting some type of research that could have an impact on modern society. Taking course after course, learning basic biology, to medical physiology, and eventually applying those concepts into my own research. Mouse lung tissue is the starting point of my research. By creating a histological

Transitional epithelium is also composed of several layers but is constructive of pear shaped cells instead. This type of tissue is stretchy, meaning it can contract and expand. It is usually found lining the urinary bladder as it allows for stretching as the bladder fills