Ascariasis is an infection affecting the small intestine that is caused by a roundworm known as Ascaris lumbricoides. This worm is the commonest intestinal roundworm affecting man and belongs to a group of roundworms called Nematodes. Ascariasis Epidemiology Ascariasis is common in humid atmosphere with poor sanitary conditions; hence is seen in the tropics …
The stratified squamous epithelium consists of cell layers in which the superficial layer consists of squamous epithelial cells while the underlying cell layers have various types of cells. The deepest layer is made up of columnar cells. This type of epithelial tissue covers body parts that are exposed to frequent frictional forces or …
Simple Columnar Epithelium Definition Simple Columnar Epithelium is a type of Epithelial tissue in which the cells are always taller than their width and they have cilia or microvilli at the apex of these cells that are often specialized for absorption the apical ends of these cells have complexes of tight junctions …
Simple Cuboidal Epithelium Definition Simple cuboidal epithelium cells are roughly as tall as they are wide they are cube-like and their greater thickness allows their cytoplasm to be rich in mitochondria and other organelles because they are involved in a high level of active transport across the epithelium and they also perform …
Simple Squamous Epithelium Definition Simple squamous epithelium is a single sheet of cells joined together by flat cells called squamous cells that line the serous cavities of bodies and the lumen of blood vessels. The epithelia the cells are flattened and their height being very little as compared to their width. Simple …
Definition Epithelial tissue is a sheet of cells joined together through the cell to cell adhesions that line the lumen of body cavities and also the outer surfaces of the body; they also line glands (serving as the secretory cells of the glands) and also line ducts of glands. When these sheets of …
Loose connective tissue is a relatively cellular connective tissue that contains three types of fibers that are loosely arranged and it also contains abundant ground substance. The loose arrangement of this type of connective tissue leaves spaces in between fibers these spaces are called Areolae (and because of these spaces, the loose connective …
Dense regular connective tissue is also known as Regular Fibrous Connective Tissue and it is a type of general connective tissues consisting of type I collagen bundles that are arranged according to a definite pattern in which the fibers and fibroblasts align parallel to prolonged resistant forces that are exerted in the same direction. The fibrocytes …