Question

Single circulation i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by?

• A. Labeo, Chameleon, Salamander
• B. Hippocampus, Exocoetus, Anabas
• C. Whale, Dolphin, Turtle
• D. Hyla, Rana, Draco

Answer 1

The correct option is B

Hippocampus, Exocoetus, Anabas

The correct option is B.

The explanation for the correct option:

1. The circulatory system is a network of blood vessels that carry oxygen and nutrients to the body and remove carbon dioxide and waste products from the body.
2. A single circulatory system, found in fish, consists of blood, blood vessels, and a bicameral heart with atrial and ventricular. This process is called gill circulation.

The explanation for the incorrect option:

Option A:

The chameleon is a reptile showing systematic circulation.

Option C:

A turtle is a reptile showing systematic circulation.

Option D:

These are amphibians and they possess an incomplete double circulatory system.

Final Answer: Hippocampus, Exocoetus, and Anabas show a single circulatory system.