Question

Human hearts contain 4 chambers, whereas cockroaches have a heart with .
A. 13 chambers
B. 8 chambers
C. 12 chambers
D. 2 chambers

Answer 1

Heart is the most important organ and it is responsible for pumping blood throughout the body. The human heart is divided into four chambers.

Complete Answer:
Let's discuss and find out the correct option.
- Body cavity of cockroaches is known as hemocoel as it remains filled with hemolymph (blood). The heart is present along the mid-dorsal line of the body. The heart of a cockroach is an elongated muscular tube. It consists of 13 segmentally arranged funnel-shaped chambers.
- A pair of ostia is present in between the 2 chambers. The heart receives oxygenated blood from the dorsal sinus through ostia. It extends from the tip of the head up to the abdominal end. The alary muscles hold the heart in position.

Thus, the correct option is A) 13 chambers.

Additional information: In humans, the heart is situated in between the two lungs in the thoracic active, slightly tilted to the left. Human heart has four chambers: atria and ventricles. Two relatively smaller upper chambers called atria and two larger lower chambers called ventricles.A thin muscular wall called the interatrial septum. It separates the right and the left atria. whereas a thick walled, the interventricular septum. It separates the left and right ventricle.

Note: The circulatory system of cockroaches consists of heart and no blood vessels, therefore, it is an open circulatory system. Also, it is to be noted, since the heart of cockroach has 8 chambers, even if one chamber fails, it does not lead to a fatal situation.