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Common Octopus Video Stock Footage

The octopus uses gills as its respiratory surface. The gill is composed of branchial ganglia and a series of folded lamellae. Primary lamellae extend out to form demibranches and are further folded to form the secondary free-folded lamellae, which are only attached at their tops and bottoms. The tertiary lamellae are formed by folding the secondary lamellae in a fan-like shape. Water moves slowly in one direction over the gills and lamellae, into the mantle cavity and out of the octopus' funnel. The octopus has three hearts, one main two-chambered heart charged with sending oxygenated blood to the body and two smaller branchial hearts, one next to each set of gills. The circulatory circuit sends oxygenated blood from the gills to the atrium of the systemic heart, then to its ventricle which pumps this blood to the rest of the body. Deoxygenated blood from the body goes to the branchial hearts, which pumps the blood across the gills to oxygenate it, and then the blood flows back to the systemic atrium for the process to begin again.

Learn more about Common Octopus

Animalia: Mollusca: Octopoda: Cephalopoda: Octopodidae: Octopus vulgaris

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