Squid Dissection - Teacher's Guide

Label the Squid (Quiz with Key)

🐙 Squid Anatomy

Mantle: The large, muscular body tube that encloses internal organs; used for locomotion.
Fins: Located on either side of the mantle; help with slow swimming and stabilization.
Head: Contains the squid's eyes, brain, and arm/tentacle bases.
Eyes: Large, human-like eyes for excellent underwater vision.
Arms and Tentacles: 8 shorter arms with suckers; 2 long tentacles for grabbing prey.
Suckers: Have toothed rings for gripping prey.
Beak and Mouth: Beak tears food; radula scrapes it inside the mouth.
Siphon (Funnel): Tube used for jet propulsion to move quickly.

Ink Sac: Produces ink to distract predators and aid escape.
Gills: Located inside the mantle cavity; used for breathing.
Hearts: Two branchial hearts (to gills) and one systemic heart (to body).
Closed Circulatory System: High-efficiency blood transport system.
Digestive System: Includes esophagus, stomach, caecum, and intestine; ends near the siphon.
Pen (Gladius): Internal chitinous shell that supports the mantle.
Nervous System: Large brain and complex nerves; capable of learning.
Reproductive Organs: Males have a spermatophore sac; females have ovaries and nidamental glands.