PrepZii

comparison

Open vs Closed Circulatory System

The source compares circulatory systems by vessel confinement and examples.

Which circulatory system has blood in sinuses?

Open circulatory system.

Feature	Open	Closed
Blood path	Pumped through large vessels into open spaces or cavities called sinuses	Blood flows through blood vessels
Regulation	Less precise	More advantageous because flow can be precisely regulated
Examples	Arthropods and molluscs	Annelids and chordates