Glands are considered as specialized epithelial cells that are adapted specifically for the purpose of secretion. This means in addition to performing functions such as protection and absorption, the cells of epithelial tissue also may secrete chemical substances. Therefore, no matter how complex a gland may be, it was first derived from epithelial …
A Cartilage is a type of connective tissue that helps in providing support and maintaining structure or morphology of the body. The cartilage is able to perform its function because of its firm consistency and ability to withstand compression and shearing forces; the cartilage can perform these functions because it is made …
Transportation Business in Nigeria is often seen as a lucrative business by many and this notion is the major reason why it is difficult to succeed in this business in Nigeria. I have tried delving into the transport business with a tricycle as well as a Mini bus (Ford Galaxy) but I …
Oogenesis is also called Ovogenesis, and it is the process whereby oogonia (immature oocytes) are transformed into mature oocytes. The process of Oogenesis begins before birth and is completed after puberty. Oogenesis even after puberty still continues to menopause (permanent cessation of menstrual bleeding associated with the menstrual cycles). Oogenesis and Spermatogenesis are forms of …
Spermatogenesis is the process through which immature sperm cells called Spermatogonia (which are actually stem cells) are transformed through a series of different types of cell divisions in order to produce mature sperm cells called Spermatozoa. Spermatogonia (or Spermatogonium singular) are undifferentiated spermatogenic cells that need to be differentiated through the processes of mitosis and meiosis before they …
Tornadoes Facts Tornadoes are the most violent of all the storms, capable of picking up trees, cars, roofs and walls of buildings. Tornadoes generally occur in middle latitudes. They are very small in size and of short duration which makes weather prediction difficult. Tornados funnel can have the size of 90-460m in …
What is Manufacturing Industry? To manufacture means to produce by the use of machinery, especially in large quantity. Manufacturing industry simply refers to the changing or transformation of raw materials into finished products in the factory. Firms which belong to the manufacturing industry are those which are involved in the making of …
Pseudostratified Columnar Epithelium is a type of a columnar epithelium which is actually single layered epithelium but may appear as a stratified epithelium hence the name: Pseudo- stratified epithelium (it is not a true stratified epithelium). This type of epithelium when viewed with a microscope will show the nuclei to lie in …