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

Males:

Virtual Dissection

• http://www.biologycorner.com/worksheets/squid_virtual.html#.Uwya-3ddV7E