Closed Circulatory System | MCQs

Explanation

In an open circulatory system, blood bathes the tissues directly, flowing through spaces among tissues, such as sinuses or lacunae. This type of circulation is found in:

• Invertebrates like insects, mollusks, and crustaceans
• Some lower vertebrates like fish and amphibians

Explanation

Annelids do have a closed circulatory system, along with other invertebrates and vertebrates

Annelids, like earthworms, have a closed circulatory system.

In annelids, blood is pumped along by muscles in blood vessels.

The blood picks up food molecules from the digestive tract and oxygen from the skin.

It then transports these to the cells of the body.