Left gill (branchial) heart pumps low O2

blood to the gills

Afferent gill blood vessel transports low O2 blood to from gill heart to gills.

Efferent gill blood vessel transportshigh O2 blood to systemic heart.

Systemicheart

Caudalaorta

Rightlateralmantle artery

Gill

Note that I removed theright gill (branchial) heart

Left gill (bracnhial) heart

Systemic heartCaudal aorta

Lateralmantleartery

Gill

Note that I removed theright gill (branchial) heart.

Right lateral mantle artery Caudal aorta Systemic heart

Left lateral mantle artery

Left gill (branchial) heart

Systemic heart

Caudal aorta

Right lateralmantle artery

Left lateral mantle arteryGill

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