Hi. Intension refers to any attribute included in a term's units, extension to the scattered units it refers to. Comprehension here refers to the sum total of intensions, within a given unit, certain units or all units. To comprehend, here, means to include - not to confuse with to comprehend in the sense of to understand. In the latter case, the inclusion implied is the inclusion of the object concerned in the subject's mind, or rather in his intellectual grasp of it. It is just a homonym. I should also add that the intension-extension distinction is rather artificial, simplistic, old-fashioned.
Something about you (optional) logician-philosopher