Question

Do cockroaches have hearts?

Answer 1

Hint: The circulatory system in cockroaches is an open type and their heart is located in the mid-dorsal region of their body. It contains 13 segmented chambers which are then funnel-shaped. The circulatory system is divided into 3 parts i.e head, abdomen, and the thorax.

Complete answer:
In cockroaches, there are 13 segments in the heart out of which 10 chambers or units are arranged dorsally, and the rest 3 units or chambers are in the thoracic region. The hemolymph is the other name of the blood of the cockroach and is found to be colorless. The heart of cockroaches consists of 13 chambers of which the first chamber is joined and opens into the aorta while small pores called Ostia enters the oxygenated blood in the heart. The backflow of blood in the Ostia is guarded by auricular valves.

Additional information:
-The Periplaneta americana is the largest species of cockroach that is commonly found around us.
-The hemolymph contains blood cells which are Hemocytes, Plasmocytes, and Coagulocytes. The blood flows directly in the tissues without any enclosure in the blood vessels.
-The plasma of hemolymph i.e blood of cockroach contains many organic compounds, ions, enzymes, and a few more required chemicals or compounds.
-The cockroach has a chitinous body i.e its whole body is covered with a chitinous exoskeleton of brown color. Their chitinous abdomen has 10 segments enclosed by sclerites that are chitinous plates.

Note:
The blood circulation is done by the heart which is an organ and is muscular in nature that helps in the pumping of blood. Cockroaches have a heart that has many chambers present in it. The human heart is less prone to heart failure than the heart of the cockroaches.