Squid Dissection |
Structure/Function:
Squids are much more developed. They have a reduced exoskeleton to protect their organs. Cephalapods have an open circulatory system with a dorsal heartbeat that creates pressure. They have a complete digestive system and reproduce sexually. Squids have bilateral symmetry and have cephalization, with a complex sensory system and eyes that form images.
Ecology:
Squid are widespread, occuring in all the world's oceans, however they are rare in tropical and polar latitudes. Squids are important to the oceanic food chain because lots of people fish for squid and whale and birds eat them to. The squid population is growing very rapidly. This is thought to be from the dramatic decrease in fish. Squids are thought to live for only about five years and the females can sometimes produce thousands of eggs at a time.
Squids are much more developed. They have a reduced exoskeleton to protect their organs. Cephalapods have an open circulatory system with a dorsal heartbeat that creates pressure. They have a complete digestive system and reproduce sexually. Squids have bilateral symmetry and have cephalization, with a complex sensory system and eyes that form images.
Ecology:
Squid are widespread, occuring in all the world's oceans, however they are rare in tropical and polar latitudes. Squids are important to the oceanic food chain because lots of people fish for squid and whale and birds eat them to. The squid population is growing very rapidly. This is thought to be from the dramatic decrease in fish. Squids are thought to live for only about five years and the females can sometimes produce thousands of eggs at a time.