Source text:

The compound eyes, which are the visual organs of most adult insects, are much more complicated. The whole eye has an external transparent layer called the cornea divided up into facets, usually hexagonal in form, each of which is the outermost part of a visual structure called an ommatidium. In some dragonflies there are over 20,000 ommatidia in each eye, and most of the higher insects like flies and butterflies have several thousand. In worker ants there may be a dozen or less, and the eye hardly functions as a compound organ. (p.32)

Source:

Tweedie, Michael, 1977, Insect Life, William Collins, Britain

Writer’s text:

In its natural habitat, the cricket can determine the current time of the day through its circadium clock, and through its compound eyes, which contain many thousands of light detectors known as ommatidia (Tweedie 1977).

Writer’s comment:

Probably when I go into specific detail into a certain part. For example, ommatidia, it was a word I didn’t know. So I got that from the author, Tweedie. I highlighted the word because I felt that it was important in explaining why or how the cricket was able to perceive light. And because I felt the word deserved to be emphasized. So I put it in bold…. The word ‘circadian clock’, for example, I cannot substitute it…. ‘Compound eyes’, for example, is just the general notion of being able to detect lights…. If I copy, ‘In its natural habitat,’ all the way to ‘ommatidia’, then I would use quotes. But because these are specific terms, I didn’t feel that they need to be quotes, or under quotations. … the author wasn’t the one who invented these two words…. I’ve heard of ‘circadian clocks’. It was just a term he used.