The four types of tissue in the human body: A tissue is a group of cells that is from similar embryological origin and is specialized for a particular function. Four types: epithelial, connective, muscle and nervous.
Confidence votes 42.1K. The anode is the arrow shaped end, while the cathode is the bar shaped end. You can remember this by recalling that current flows from anode to cathode in an ordinary diode; well, that is, if you use the trick of assuming that current is hole flow, rather than electron flow, a useful and common convention.
Diode is a two terminal device (di-means two). Simply put, it acts as a one-way valve for electrons. Conventional current can flow from the anode to the cathode, but not in the other direction.If an intrinsic semiconductor is doped with a pentavalent or trivalent impurities you get a diode. Selenium diodes work much like any other diode. They allow current to flow in a forward direction and block current from flowing in the opposite direction. They have a h â¦ igher forward bias voltage then silicon and as such generate much more heat then a comparable silicon diode.