Question

There are ………… chambers in the heart of the cockroach.

Answer 1

Hint: Cockroaches have multi-chambered hearts, which is resistant to failure. In cockroaches, all chambers are organized one by one and the pump blood sequentially. If one of the chambers fails, the heart will be working but with less efficiency.

Complete answer:
Cockroach is an insect in which blood flows openly, that is it follows an open circulatory system in which blood doesn’t flow in vessels. It flows through a single structure with 13 chambers and is considered as the heart of the cockroach.
Thus, cockroaches have 13 chambered hearts.

Additional Information: As a cockroach is an arthropod, its body is divided into three distinct regions that is, head, thorax and abdomen. Skeleton of the cockroach is hard and brown in colour, made up of chitin. Cockroach is a dioecious animal that has male and female sexes separately. Male are longer in length and females are slightly smaller.
Cockroach is an insect which has a long pair of antennae which helps in the smelling and feeling vibrations. These antennas are connected to the head which contain the brain, eyes and mouth. But cockroaches have poor vision. After that body of cockroach body comes which includes three pairs of legs, wings, and abdomen.

Note: Heart of the cockroach is like tubes, which helps in pumping blood from one chamber to another chamber. Heart of the cockroach lies at the mid dorsal of the body. First chamber of the heart is connected with the aorta and subsequent chambers are connected by a pair of small lateral apertures or ostia, which opens up into pericardial sinus.