Transitional epithelium is also called Uroepithelium or Urothelium (because it lines the urinary system), and it is a type of stratified epithelial tissue in which the surface cells change shape from being rounded to squamous in nature. Transitional epithelium is located in the urinary system, especially the urinary bladder. When the bladder is empty, the surface …
What is Biodiversity? Biodiversity in ecology is the geographical distribution of all species of plants, animals, insects and the microorganisms inhabiting the earth either in the aquatic or the terrestrial habitats. Biodiversity is a term that combines two words, Bio (life) and diversity (variety). However, biodiversity is defined as the number and variety of organisms found …
Definition of Volcano A volcano is defined as a hill or mountain that has an opening through which, ashes gases, cinder etc are forced out in an eruption; or a volcano is a landform that is created by the ejection of gases, lava, ashes and/or molten rock material which escaped through the vent and …
As the climate and ecology of Nigeria vary, so do the ecological zones of Nigeria. Nigeria has two major ecological zones and they are the Savannah and Forest ecological zones. These ecological zones are subdivided into three each known as Vegetation belt. The Forest zone is subdivided into: Mangrove or Salt water swamp, the Fresh water swamp and the High …
Smooth Endoplasmic Reticulum Structure Smooth Endoplasmic Reticulum is the endoplasmic reticulum with smooth appearance. It is also called Agranular reticulum and because it is formed by many interconnected tubules, it is also named as Tubular Endoplasmic Reticulum. This type of Endoplasmic reticulum is devoid of ribosomes and constitute a small part of the total ER. The agranular reticulum functions …
The Rough endoplasmic reticulum got its name from the appearance of Ribosomes on the membrane of the rough ER when observed with a light microscope. In most places the membranes forming the Endoplasmic reticulum are studded with minute particles of RNA called ribosomes. The presence of these ribosomes gives the membrane a rough …
Endoplasmic Reticulum (ER) is found in the cytoplasm of most cells and forms a system of membranes. The membranes form the boundaries of channels that may be arranged in the form of flattened sacs (or cisternae) or of tubules. Because of the presence of the Endoplasmic Reticulum, the cytoplasm is divided into …
Cytoplasm Definition The Cytoplasm of both plant cells and animal cells is the jellylike material formed by 80% of the water that contains a clear liquid portion called the cytosol and various particles of different shapes and sizes; these particles are proteins, carbohydrates, lipids, or electrolytes in nature. It also contains many …