Question

Which of the following has a closed type of circulatory system?
A. Cockroach
B. Fish
C. Scorpion
D. Limulus

Answer 1

Hint: A closed type of circulatory system is the one in which the blood flows inside the vessels and reaches the cells via the capillaries. Moreover, species of phylum Pisces have a closed circulatory system.

Complete step by step answer: The blood circulation in animals is characterized by two types. These two types are – Open and closed circulatory systems.
1. Open type of blood circulatory system: In this type of blood circulatory system, the blood flows upon the cells like a shower. This is because the blood is released in the coelom directly to reach the cells. Here the blood vessels are present but the capillaries are absent. The heart may or may not be present. Also, it is difficult to collect the blood back so the blood pressure is low.
2. Closed type of blood circulatory system: In this type of blood circulatory system, the blood reaches the cells via capillaries. This is because the blood is released by the capillary pores to directly reach the cells. Here the blood vessels and capillaries both are present. The heart is also present. Also, the flown blood can be collected back so the blood pressure is high.
Let us look at all the options that are given to us one by one.
-Cockroach: Cockroach belongs to the phylum Arthropoda. This phylum is characterized by the open type of blood circulatory system. In cockroaches, the blood is released in the coelom directly to reach the cells. Also, the cockroach has 13 hearts.
-Fish: Fishes also known as Pisces belong to the phylum Chordata. This phylum is characterized by the closed type of blood circulatory system. In fishes, the blood is released by the capillary pores to directly reach the cells.
-Scorpion: Scorpion belongs to the phylum Arthropoda. This phylum is characterized by the open type of blood circulatory system. In scorpions, the blood is released in the coelom directly to reach the cells.
-Limulus: Limulus also known as King Crab belongs to the phylum Arthropoda. This phylum is characterized by the open type of blood circulatory system. In Limulus, the blood is released in the coelom directly to reach the cells.
Thus, based on the above information we can conclude that Fish has a closed type of circulatory system.
Hence, the correct answer is option (B)
Note: There are two circulatory systems - open and closed circulatory system. The open circulatory system is found in arthropods (insects) and mollusks while the closed circulatory system is found in vertebrates.