Question

Lateral oesophageal heart connects

• A. Dorsal vessel and ventral vessel
• B. Supra oesophageal vessel and lateral oesophageal vessel
• C. Dorsal vessel, supra oesophageal vessel and ventral vessel
• D. Dorsal vessel and subneural vessel

Answer 1

Answer: (C)

Dorsal vessel, supra oesophageal vessel and ventral vessel

The earthworm has a closed circulatory system which consists of blood, blood vessels and heart. The hearts present in the 12${}^{th}$ and 13${}^{th}$ segment in the body of earthworm are known as lateral oesophageal hearts. The dorsal vessel is the longest vessel that extends through out the body of earthworm and lies above the alimentary canal. The ventral vessel is located below the alimentary canal at an anteroposterior position. Supra-oesophageal vessel lies on the stomach in the median position. Thus, lateral oesophageal heart connects the above three vessels.

So, the correct answer is option C.