Question

In a closed circulatory system blood is completely enclosed within:

• A. sinuses
• B. vessels
• C. heart
• D. skeleton

Answer 1

The correct option is B

vessels

Correct answer is option B

Explanation for correct option:

• In a closed circulatory system, blood is completely enclosed within vessels.
• Blood flows in the blood vessels with high pressure such that it reaches all body parts.
• The blood vessels are branched into fine capillaries which are involved in exchange of materials.

Explanation for incorrect options:

Option A

• Sinuses are the air-filled spaces in the skull.
• They are located behind the forehead, nasal bones, cheeks and eyes.

Option C

• Heart is a muscular organ that consists mainly of cardiac muscles and pumps blood through blood vessels to all body parts .
• It has four chambers namely, right and left atrium, right and left ventricles.

Option D

Skeleton is a framework made up of bones that supports the structure of a body.

Final answer: In a closed circulatory system blood is completely enclosed within vessels.