Question

Number of salivary glands present in cockroach is
1) one pair

2) two pairs

3) three pairs

4) four pairs
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Answer 1

Explanation:

1. in cockroack glands are paired and white structures and are situated one on either side of crop in the prothoracic region.
2. The salivary glands, as a matter of fact, are comprised of a glandular part and a hollow receptacle or reservoir.
3. The receptacle is situated between paired glands of each side and remains connected through a duct.

The glands are compressed, made up of hexagonal glandular cells and each of them opens into a small narrow duct The ducts of two glands of one side join into a salivary duct and the salivary ducts from two sides join into a common duct.

1. The common duct receives the ducts from two receptacles and transforms into a spacious efferent salivary duct.
2. The efferent salivary duct opens at the base of hypo pharynx, which is situated on the floor of buccal cavity.
3. The glands secrete digestive enzymes which are stored in reservoir till they are required for digestion of food.

Answer 2

one pair of salivary glands present in cockroach.

Explanation:

• A shared duct, which exits at the base of the buccal cavity, allows these salivary glands to discharge their secretion.
• It's also referred to as lingua or tongue.
• There are two salivary glands in the cockroach.
• At the base of the hypopharynx, the salivary reservoir's main duct opens.
• It's a tongue-like protrusion that hangs between the upper and lower jaws.
• It is responsible for mixing the food in the saliva.
• The pre-oral cavity, which is located next to the mouth, is a tiny gap between the cockroach's mouthparts.
• In this cavity, the hypopharynx hags.