Epithelium

Aim 1: Analyzing the formation of the epithelium of visceral endoderm surrounding the internal cavity in locally-instructed embryoids Sub-aim 1.1: Investigating the formation of an endodermal epithelium around the cavity Rationale: VE is derived from PrE, an epithelial tissue that separates the ICM from the blastocoel. PrE and Epiblast (Epi) cells exist in a ‘salt and pepper’ manner in the ICM by E3.5, which can be visualized by the complementary expression patterns of Gata6 (PrE) and Nanog (Epi) (Chazaud et al., 2006). The PrE cells are sorted from the ICM through differential adhesion (Gerbe et al., 2008) and cortical tension (Moore et al., 2009) and become a morphologically distinct tissue by E4.5. PrE/VE epithelial tissue surrounds in the…

Kim 2 Shape & Structure The pseudostratified columnar epithelium is a special simple columnar cell that appears to be stratified. However, upon closer inspection of the cell, we see that it only has one layer instead of the multiple layers like it's stratified counterpart. The actual shape of the cell itself consists of basal, fusiform, and columnar cells with only the columnar cells reaching the apical(free) surface, this makes it appear stratified due to the other cells (basal & fusiform) not…

Task 1 Unit 11 Diagram Task 2 Unit 11 Four main tissue types Epithelial tissues One of the main tissue type are the one that characterize the epithelium .The epithelial tissues are used as cover for the all of our body surface both internal and external .Our epithelium it is formed by cells tissues that are one cell thick which make up the simple epithelium and from cells which are two or more cell thick which make up the stratified epithelium. The Simple Epithelium is made of…

In a human body, there are four core classifications of tissues, which are epithelial tissue (plural form epithelium), connective tissue, nervous tissue, and muscle tissue. And each of these tissues has its own unique function in our body that makes us a perfect complement function organism. In the beginning, the simplest structural elements or atoms such as calcium (Ca +2) or sodium (Na +1) involve in the basic unit of living matter. These matters combine to form other matters like the fusion…

Discussion The basic types of tissue represented in the chicken lab dissection were connective, muscular, and epithelial tissue. Each of these three tissue are related and serve the body to allow it to function. Both the epithelial and connective tissues provide protection. Epithelial tissues protect exposed and internal surfaces, while connective tissue protects internal organs. Connective and muscular tissue both transport fluids and essential substances throughout the body.…

P2 Task two Tissues The tissues are structures formed by a group of billion of cells with a similar structure. A group of cells together form tissues, tissues from organs and organs are form system organs. There are four different types of basic animal tissue: 1) Epithelial Tissue: This tissue is formed of one or a few layers of cells adhere to a basement membrane. it is found in internal and external organs surfaces. It is divides into: a) Squamous Epithelium - Squamous Simple Epithelium: the…

It functions consist of absorption and secretion (enzymes, mucus, and other substances) through ciliary action. It is located in the digestive tract (stomach to the anal canal), excretory ducts, gallbladder, small bronchi, certain parts of the uterus, and uterine tube. Pseudostratified Ciliated Columnar epithelium: It is a single layer of cells. Some are described as being: different in height (some do not reach the free surface), the nuclei are seen at various levels, and can consist of…

metal NPs have a wide range of therapeutic applications, studies have shown a significant link between inhaled particulates and increased lung inflammation and injury leading to decreased lung function (Mody et al, 2010). Injury induced by metal NPs can be found throughout the entire respiratory tract. For example, male Wistar rats exposed to high doses of titanium oxide (TiO2) NPs were found to have deposition of the particles in the nasal cavity and at the base of the epiglottis along with…

As with the male counterpart, the ovaries are derived from the genital ridge later descending to their final position in the pelvis. In adults, the ovaries have an ovoid shape and are usually 3-5cm long. They are a layered structure with an outer layer germinal epithelium, tunica albuginea, cortex and medulla that is innermost (fig. 1). Although now challenged by recent discoveries (1), the germinal epithelium; a continuation of the peritoneum, is inaptly named due the mistaken belief that germ…

The epidermis is the top most layer of the skin. The type of epithelia found here is keratinized stratified squamous epithelium. This layer consists of 4 layers of think skin or 5 layers of hard skin and is avascular which means there are not blood vessels in this layer. On the epidermis are epidermal ridges that allow it to lock with the dermis. The cells within the epidermis are keratinocytes that produce keratin and are the most numerous; melanocytes that are in the deepest layer of epidermis…