To understand the male reproductive system, one must know the external and internal structures, and the process of spermatogenesis (sperm production) including the physiologic pathway of the sperm cell.tructures. The male external structures are the penis and the scrotum (a pouch which protects the testes). The penis consists of the glans (the head), and the shaft (the body). The glans is covered by a fold of skin called the foreskin (circumcision removes the foreskin).
Cold Stratification - How to Stratify Seeds Stratification Method. Custom Search. The Cold Moist stratification is the process by which we imitate the period of cold and moisture in nature required for perennials seeds germination (break dormancy). These perennials or native perennials seeds are much more difficult to germinate.
The ozone layer is a part of the atmosphere that is nothing but a layer of Ozone gas (O3) that allows the sunlight to penetrate into the atmosphere but reflects back the har â¦ mful UV (ultra-violet) rays of the sun. Global warming is the very phenomenon which is causing Earth to fall apart today. A: Differences: Global warming is an increase in surface temperatures.The hole in the ozone layer is a natural repeating phenomenon, for the pole that is experiencing winter. Ozone decays naturally with time, and due to forcings by various contaminants.