Explanation

Circulatory patterns are two types Open Circulatory Pathways Present in arthropods and molluscs in which the blood pumped by the heart passes through the large vessels into the open spaces of body cavity called sinuses Closed Circulatory Pathways Annelids and chordates have closed circulatory system in which the blood pumped by the heart is always circulated through a closed network of blood vessels. This pattern is considered to be more advantageous as the flow of fluid can be more precisely regulated