SQUID DISSECTION PREPARATION!
5th Grade Ms. B
Key Terms
• Stomach • Ink sac• Esophagus• Gill• Heart• Gonad• Anus• Pen
Key Terms
• Arms• Tentacles• Nidamental Gland• Buccal Bulb• Chromatophores
Buccal Bulb: muscle that operates the beak
Radula: rows of teeth
Squid Anatomy
• Chromatophores: spots change size to change the squid’s color for camouflage
Fins: Help squid change direction when swimming
Mantle: the main part of the squid’s body that covers its internal organs
Pen: feather-shaped internal structure that supports the squid’s mantle and stabilizes the squid for swimming
Stomach: digest food
Ink Sac: defense mechanism
Ink: pigment melanin which artists refer to as “sepia ink”
• Octopi = black ink
• Squid = blue-black ink
• Cuttlefish = brown ink
Eyes: ability to see as well as people!
Have 8 arms and 2 tentacles
Arms vs. Tentacles
• Arms: short, rip apart prey and stuff it into the mouth
• Tentacles: long and have suckers on the end shoot out to capture prey
Suction cups: help squids hold onto food and act as “taste buds”
Gills: absorb oxygen from water
Beak: mouth resembles a bird’s beak
Gonad: reproductive organmales = white in color
females = clear
Siphon: a tube that squirts out water so that the squid moves like a jet airplane
Male or Female? • Females: – Eggs = yellow in color– Nidamental glands: large, oval white organs in the
middle of the cavity
Virtual Dissection
• http://www.biologycorner.com/worksheets/squid_virtual.html#.Uwya-3ddV7E