Question

1. use the descriptions and other resources to label the squid.

gill
arm
heart
brachial heart
eye
gonad
tentacle
esophagus
ink sac
suckers
water jet
fin

Explanation:

Each label is matched to the corresponding squid anatomy structure based on biological knowledge of cephalopod anatomy:

1. The long, appendage with suckers at the tip is a tentacle.
2. The shorter, sucker-lined appendages near the head are arms, with the suckers visible on them.
3. The large, circular structure on the side of the head is the eye.
4. The opening near the head for expelling water is the water jet.
5. The tube-like structure leading from the mouth is the esophagus.
6. The respiratory structures in the mantle are gills.
7. The central organ in the lower mantle is the heart.
8. The organs near the heart associated with gill circulation are brachial hearts.
9. The reproductive organ in the lower mantle is the gonad.
10. The sac-like structure for defense is the ink sac.
11. The wing-like structure at the mantle's base is the fin.

Answer:

• Topmost label (long appendage): Tentacle
• Second top label (short appendage): Arm
• Third top label (circular head structure): Eye
• Fourth top label (head opening): Water jet
• Fifth label (tube from mouth): Esophagus
• Sixth left label (mantle respiratory structure): Gill
• Seventh left label (central mantle organ): Heart
• Eighth left label (organ near heart): Brachial Heart
• Ninth left label (lower mantle reproductive organ): Gonad
• Tenth right label (defensive sac): Ink sac
• Bottom label (mantle wing structure): Fin
• Label on short appendage tip: Suckers