A cockroach has only one heart but unlike other animals its heart may have 13 chambers or more.

Cockroach Heart:

Cockroaches are insects that belong to the order Blattodea. They have an open circulatory system, which means that their blood or hemolymph flows freely throughout their body cavity. Unlike humans, cockroaches do not have a centralized organ like a heart to pump their blood.

How does the blood circulate in cockroaches?

In cockroaches, the blood circulates through a series of small tubes or channels called tubular hearts. These tubular hearts are located along the length of the insect's body, and they contract rhythmically to pump the blood forward.

How many hearts do cockroaches have?

Cockroaches have multiple tubular hearts that are distributed throughout their body. The number of hearts varies depending on the species of the cockroach. However, on average, a cockroach has 13 tubular hearts that help to circulate its blood.

What is the function of cockroach hearts?

The function of cockroach hearts is to pump hemolymph or blood throughout the body. The hemolymph carries nutrients, oxygen, and waste products to and from the cells of the body. The tubular hearts contract rhythmically to pump the hemolymph forward, and the blood flows freely throughout the body cavity.

Conclusion:

Cockroaches have an open circulatory system, and they do not have a centralized organ like a heart to pump their blood. Instead, they have multiple tubular hearts that are distributed throughout their body. These tubular hearts contract rhythmically to pump the hemolymph forward, and the blood flows freely throughout the body cavity. On average, a cockroach has 13 tubular hearts that help to circulate its blood.