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.
The anode is not always the positive lead. It is the electrode through which electric current flows into a polarized electrical device. For a discharging battery, this is the negative lead. This is how I connected anode/anion and cathode/cation during chemistry class when we were discussing batteries. I was confused when I learned that for other components, such as an LED, the kathode is negative, and the anode is positive.