Mollusc Animation: Squid Body Plan


The squid’s body plan has developed for fast action. The shell is reduced to a thin ‘pen.’ The mantle wall has elastic fibers that intensify the jet propulsion. Giant nerves allow a fast reflex and three hearts pump oxygen to the gills

Next Generation Science Standards for this Video

The squid body plan is specialized for an active life style.

Through natural selection an ancient squid evolved new structures from the body plan it inherited from its molluscan ancestors to live an active life off the bottom competing with fish.