Active immunity involves your bodies direct response to an unknown pathogen. passive immunity<span> is an </span>immune<span> response which involves antibodies obtained from outside the body.</span>
<span>Watery eyes can defend you from dust or any factors that can directly enter your eyes. Watery eyes can get rid of everything that is bothering them like chemicals, salt, and pepper. If you notice, when you slice an onion, your eyes will slowly be in tears. This is to protect your eyes from the substance that an onion excreted when it is sliced.</span>
Well, the cells and bricks are similar because cells are the building blocks of life and bricks are the building blocks of buildings. Cells are necessary for life, bricks are necessary for buildings.
They are different in the way of cells have nucleus'es (plural form of nucleus, I suppose) and other things inside it that do jobs, bricks don't have that.
