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Squid & CrocodileCirculatory System
Azneezal Ar-Rashid
Smk Sri Aman
• The squid has a relatively complex circulatory system for invertebrates, with a closed circulatory system.
• The squid has two branchial hearts at the base of the gills which send unoxygenated blood through the gills.
• The third ventricular heart then pumps this oxygenated blood throughout the body.
crocodile: circulatory system
• In crocodiles the ventricular septum is complete, but the two aortas come out of different ventricular chambers.
• A semilunar valve at the entrance to the left aorta prevents nonaerated blood in the right ventricle from flowing into the aorta.
• Instead, part of the aerated blood from the left ventricular chamber pumped into the right aorta flows into the left by way of an opening.
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