Epithelium

In your own words, explain why the stratum corneum is so important when discussing dermal absorption? The Stratum Corneum is the outermost layer of the epidermis and it is made up of stratified squamous epithelium with no blood vessels. As the cells of the epidermis divides and age, the older epidermal cells are pushed away from the dermis to the epidermis towards its outer surface (stratum corneum). It would be right to describe the stratified squamous cells of the stratum corneum as many…

functions, and cutaneous sensations. The skin is composed of two distinct regions: epidermis and dermis. The epidermis is composed of epithelial cells and is the outermost protective shield of the body. The epidermis is a keratinized stratified squamous epithelium consisting of 4 distinct cell types (keratinocytes, melanocytes, Merkel cells, and Langerhans’ cells) and 4-5 distinct layers. The underlying dermis makes up a bulk of the skin. It is a tough, leathery layer composed of fibrous…

M2: Cell differentiation is the process in which a generic embryonic cell develops into a specialized cell to do a particular job or function which has been triggered by the body or the actual cell itself by signals. The signals are sent to the cell receptor, which interprets the message through a signal transduction pathway. This pathway converts the message into something that the cell is able to recognize and understand. This is how a cell learns its functions and purpose. Cell…

Skin A third-degree skin burn extends through the entire epidermis, dermis and hypodermis, but leaves the underlying muscle and bone tissue in a functional state. Skin is made up of three layers: the epidermis, dermis and hypodermis. The epidermis is ectodermal in origin. It is relatively void of ECM except for the basal membrane and has a distinctive keratinized layer produced by keratinocytes. Other artifacts of the epidermis include melanocytes, hair follicles, sebaceous glands, and sweat…

1. The three major layers that make up healthy skin are the epidermis, dermis, and the subcutaneous tissue (hypodermis). The epidermis is a keratinized stratified squamous epithelium that resists abrasion and reduces water loss. It consists of four distinct cell types and five layers. The dermis, the second major skin region containing strong, flexible connective tissue. It is composed of dense irregular connective tissue. Also, the dermis contains the blood vessels, nerve fibers and lymphatic…

1. The three major layers that make up healthy skin are the epidermis, dermis, and the hypodermis. The epidermis is a keratinized stratified squamous epithelium that resists abrasion and reduces water loss. It have four cell types and five layers. The dermis made of strong, flexible dense irregular connective tissue. It contains the blood vessels, nerve fibers and lymphatic vessels. The sweat glands and the hair follicles live in the dermis layer. The hypodermis is deep to the skin. It is made…

toughest organ that the human body has, and it has three coating layers. One is the epidermis, the next is the dermis, and the last layer is the subcutaneous tissue known as the hypodermis. A. Epidermis - This outer layer has stratified squamous epithelium to make the skin solid and strong. The epidermis…

Genus Dysteria (Huxley, 1857) Synonyms: Aegyria Ehrenberg, 1838; Ervilia Dujardin, 1841 This genus was first reported by Huxley in 1857. It is a member of class Phyllopharyngea shows characters such as ciliated stage with somatic kineties mostly as monokinetids that each have a lateral kinetodesmal fibril, a reduced or absent, transverse microtubular ribbon. This genus belongs to subclass Phyllopharyngia show characters such as trophonts free-swimming, may be sessile but usually not…

Pseudomelanosis gastri and duodeni is a rare endoscopic mucosal finding, characterized by the accumulation of iron in macrophages of the lamina propria of the stomach and duodenum. The clinical significance and long term sequelae have not been clarified. However, this benign condition is associated with a variety of clinical conditions, such as essential hypertension, chronic renal failure, diabetes mellitus, long term intake of iron supplements and furosemide. Pseudomelanosis duodeni appears to…

Functions of the skin: There are eight main functions associated with the skin. These are as follows... 1. Secretion – the skin secretes sebum from the sebaceous glands. This fatty substance lubricates the hair shafts and when combined with perspiration on the surface of the skin, it creates a natural moisturiser which acts as a protective barrier against bacteria. 2. Heat regulation – body temperature is maintained in healthy humans at 37oC (98.6oF). organs involved in heat production are…