Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Blood from sinuses enters in the heart of Cockroach through ..........
Blood from the sinuses enters the heart of a cockroach through ostia. Ostia are valvular openings located on the sides of each heart chamber. These openings allow the haemolymph to flow into the heart from the body cavity, ensuring circulation throughout the insect's body.
How many number of Ostia are present at the posterior end of heart of Cockroach ?
In the heart of a cockroach, there are 2 pairs of ostia at the posterior end. Ostia are small openings that allow the hemolymph to enter the heart from the sinuses. This is a key feature in the circulatory system of a cockroach.
Which is the path of blood circulation in Cockroach ?
The circulatory system of a cockroach is open type. The heart pumps the hemolymph into the sinuses, and from there it returns to the heart. Hence, the correct path is 'Heart - sinuses - heart'.
Total how many spiracles occur in Cockroach ?
A cockroach has a total of 10 pairs i.e. 20 spiralces in all. These are organised as 2 pairs of thoracic spiracles and 8 pairs of abdominal spirales
In Cockroach how many spiracles are present in thoracic region and how many spiracles are present in abdominal region ?
Cockroaches have a total of 10 pairs of spiracles. Out of these, 2 pairs are located in the thoracic region, and 8 pairs are located in the abdominal region. Spiracles are external respiratory openings.
The walls of spiracles are framed from ..........
The walls of spiracles in insects like cockroaches are lined with chitinous bristles. These bristles help in filtering out dust particles and other debris, preventing them from entering the tracheal system. Chitin is a structural component in the exoskeletons of arthropods, making it a suitable material for this function.
In respiratory system of Cockroach.......... function as filters.
In the respiratory system of a cockroach, chitinous bristles function as filters. They are present at the opening of the spiracles and help to filter out dust and other particulate matter, ensuring that only clean air enters the tracheal system.
Main excretory units in Cockroach are ...........
The main excretory units in cockroaches are Malpighian tubules. These tubules are responsible for the removal of waste products from the hemolymph (the insect's blood) and their excretion into the digestive tract, where they are expelled from the body.
Write location and numbers of Malpighian tubules in periplaneta
In Periplaneta (the common cockroach), the Malpighian tubules are located at the junction of the midgut and hindgut, and there are about 150 of them. These tubules play a crucial role in the excretory system, helping to remove waste products from the hemolymph.
In cockroach color of Malpighian tubules is .......... and their........ end is blind.
In cockroaches, the Malpighian tubules are yellow in color, and their free (distal) end is blind. These tubules float freely in the hemolymph and are responsible for the excretion of nitrogenous wastes.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every Zoology question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.