A simple epithelium has cells that form a single layer that are attached to the basement membrane. A stratified epithelium, on the other hand, consists of multiple layers of cells where only the basal layers are attached to the basement membrane.Know More
The epithelium is one of the four major tissues in the body. It is made up of cells that are usually arranged in sheets or tubules that are connected to the underlying basement membrane. The epithelium serves as a covering for a number of internal and external surfaces of the body, and it can form glandular structures.
Different types of epithelia are classified according to the shape of the cells and whether or not the cells are layered. A simple epithelium may also appear as stratified and this type is classified as "pseudostratified epithelium." The cells that make up the epithelium are classified according to shape. These classifications are squamous (flat), cuboidal and columnar.Learn more in Biology
The main difference between autotrophic organisms and heterotrophic organisms is that the former produce their own food, while the latter rely on other organisms for food. Autotrophs create nutritional organic substances from simple inorganic sources like carbon dioxide. Heterotrophs cannot produce organic compounds from inorganic substances.Full Answer >
Transudate and exudate are both fluids extruded from various parts of the body, but transudate is usually clear and relatively free of cells and proteins while exudate has a high content of cells, cellular debris and proteins. The terms "transudate" and "exudate" refer to the fluid itself and not to a specific ailment or injury. However, the terms are often associated with transudate pleural effusion and exudate pleural effusion.Full Answer >
Bacteria and protozoa are very distantly related, with bacteria classified as prokaryotes and protists as eukaryotes. This means that protozoa are more closely related to humans than either is to bacteria. The two organisms are structurally distinct. Bacterial cells lack a nucleus, and protozoa contain organelles, such as mitochondria.Full Answer >
Although they are both billfish, marlins belong to the family Istiophoridae, while swordfish are the only members of the family Xiphiidae. Visually, the biggest difference is that marlins have a ridge on their back while swordfish have a single dorsal fin.Full Answer >