Question

Select the correct set of organisms in which closed
circulatory system is present.

1) Octopus, Sepia, Unio
2) Octopus, Loligo, Sepia
3) Pila, Unio, Mussel
4) Mussel, Octopus, Unio​

Answer 1

Answer:

2) octopus loligo sepia

Explanation:

in mollusca phyllum cephalopods have closed circulatory system and it includes squid, octopus, cuttlefish. scientific names loligo squid and sepia cuttlefish

Answer 2

Answer:

The correct answer is 2) Octopus, Loligo, Sepia.

In Octopuses closed circulatory system is present in which the blood remains inside blood vessels in the body.

Sepia is class and it includes octopus and squids. They all have closed circulatory systems.

Loligo belongs to the squid family it also has a closed circulatory system.

Explanation:

1. Unio a sea organism has no capillaries in its body to circulate the blood hence it has an open circulatory system.
2. Pila or apple snail a sea organism have a closed circulatory system. It is the only non-chordate to which have it.
3. In Mussels blood is not transported in the vessels, hence it also has an open circulatory system.