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.
Freezing, or solidification, is a phase transition in which a liquid turns into a solid when its temperature is lowered below its freezing point. For most substances, the melting and freezing points are the same temperature; however, certain substances possess differing solidâliquid transition temperatures.he melting point of water at 1 atmosphere of pressure is very close to 0 Â°C (32 Â°F, 273.15 K), and in the presence of nucleating substances the freezing point of water is close to the melting point, but in the absence of nucleators water can super cool to â40 Â°C (â40 Â°F, 233 K) before freezing.