Squid Dissection SiphonFunnel n Squid draws water into

Squid Dissection

Siphon/Funnel n Squid draws water into mantle cavity through the collar n Water is forced back out the siphon

Siphon/ Funnel

Siphon Retractor Muscles n n Used to change the orientation of the siphon, resulting in a change in direction of the jet of water exiting the siphon Aids in swimming direction

Siphon Retractor Muscles

Anterior Vena Cava n Vein n Brings un-oxygenated blood back from the head to the branchial hearts

Anterior Vena Cava (Vein)

Ink Sac n n Silvery structure attached to the rectum Filled with a pigment that can be ejected into the water when the squid is disturbed

Ink Sac Anus

Anus n n Connected to the ink sac is the rectum, with the anus at the end Release waste & ink

Ink Sac Anus

Gills 2 Respiratory organs n Oxygenates blood, removes carbon dioxide n

Gill

Branchial Hearts n Pumps oxygen-poor blood to gills

Branchial Heart

Systemic Heart n Found under branchial hearts, between 2 gills n Pumps oxygen-rich blood back to the body/head

Systemic Heart

Caecum n n Can expand greatly to hold food/nutrients Absorbs nutrients for the body

Caecum

Under-Side Cecum

Pen n Functions as the skeleton n Provides support for the mantle n Provides a place for organ attachment

Pen

Pen: Pulled out

The End