EasyBiologyHigh School (11–12)Tissues and Organs › Structural Organisation in AnimalsConceptualA-LevelIB
Name the part of the cockroach in each clue…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Name the part of the cockroach in each clue.
- The leathery front wings that cover the hind wings at rest.
- The jointed pair of filaments on the tenth segment of the abdomen, in both sexes.
- The structure that is present only in the male at the tip of the abdomen.
- The units of the compound eye, of which there are about in each eye.
- The part of the mouth that acts as a tongue.
Need a reminder? The key ideaShow
The cockroach (Periplaneta americana) is an insect, in the phylum Arthropoda. Its body is covered by a hard chitinous exoskeleton made of plates called sclerites, and is divided into the head, the thorax and the abdomen. The head has two compound eyes, two antennae and chewing mouth parts. The thorax has three segments with three pairs of walking legs, and two pairs of wings: the leathery forewings (tegmina) and the membranous hind wings. The abdomen has ten segments and ends in a pair of anal cerci. The alimentary canal has a foregut (mouth, pharynx, oesophagus, crop and gizzard), a midgut and a hindgut (ileum, colon and rectum). The gizzard grinds the food with six chitinous plates.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) The tegmina, which come from the mesothorax.
Step 2. (b) The anal cerci.
Step 3. (c) The anal styles. The female does not have them.
Step 4. (d) The ommatidia.
Step 5. (e) The hypopharynx.
Answer: (a) tegmina; (b) anal cerci; (c) anal styles; (d) ommatidia; (e) hypopharynx.
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