Question

define double circulation and differentiate between closed and open circulatory system
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Answer 1

Answer:Closed circulatory systems have the blood closed at all times within vessels of different size and wall thickness. In this type of system, blood is pumped by a heart through vessels, and does not normally fill body cavities. The open circulatory system is common to molluscs and arthropods

Double circulation is a process in which blood flows twice through the heart. ... Pulmonary artery carries impure blood to lungs for purification. After purification oxygenated blood reaches to the left atria via pulmonary vein then to left ventricle

Explanation:

Answer 2

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Double circulation - A type of blood circulation system in which the blood flows through the heart twice. In this type of circulation, the pulmonary circulation is separate from the systemic circulation

differentiate between closed and open circulatory system -

Refer to the attachment ♡~