Question

Head of cockroach according to its position is known as
A. Hypopharynx
B. Hepatocerebral
C. Hypognathous
D. Supragnathus

Answer 1

Hint: Insects are the highest class of the phylum Arthropoda, which is itself the greatest of the invertebrate phyla. Insects have segmented figures, jointed limbs, and external exoskeletons (skeletons). Cockroach is an example of insects.

Complete Answer:
Before we find the correct answer, let us understand a little more about Insects.
Insects are divided into mainly three different types based on the arrangement of their head with respect to the long axis of the insect body. These are:
- Prognathous
- Hypognathous
- Opisthognathous

Option A: The hypopharynx is the rear section of the pharynx, which is a round tube that is around 5 inches long. The pharynx begins following the nose, goes down the neckline, and finishes at the oesophagus. Therefore this is an incorrect option.

Option B: Hepatocerebral is an exceptional unchangeable extrapyramidal neurodegenerative the situation found in victims with cirrhotic chronic liver disease, occurring in extensive cerebral, basal ganglia and cerebellar degeneration. Therefore this is an incorrect answer.

Option C: Hypognathous is also known as the cockroach’s head. The extended axis of the head is perpendicular i.e. at the right aspect to the long axis of the body. The mouthparts are present downwards e.g. grasshopper, cockroach etc. Therefore, this is the correct answer.

Option D: Opisthognathous bugs have their head slanting and the mouth-portions are present ventroposterior. Therefore, this is an incorrect answer.

Thus, option C is the correct answer.

Note: Insects are differentiated from other arthropods by their shape, which is classified into three important sections:
- The head, which shows the mouthparts, optics, and a couple of antennae,
- The three-segmented thorax, which normally has three sets of legs in grown-ups and normally one or two sets of wings, and
- The many-segmented stomach, which includes the excretory, digestive, and reproductive organs.