Pre-Lab: Anatomy of a Squid
Problem What structures does a squid use to obtain nutrients and eliminate wastes?
Materials squid, dissecting tray, hand lens, forceps, dissecting scissors, dissecting pins, dissecting probe
Lab Manual Chapter 27 Lab
Skills Focus Observe, Infer, Sequence, Draw Conclusions
Connect to the All animals obtain their food by eating other organisms. All animals need a way to digest the food, and most animals need a way to circulate the absorbed nutrients to all the cells in the body. Animals also need to absorb oxygen from their environment for cellular respiration. Finally, animals need to rid their bodies of wastes.
The ways that animals meet these needs vary greatly. Often, different habitats require different structures. For example, an animal that must obtain its oxygen from air will not have the same respiratory structures as an animal that must obtain its oxygen from water. In this lab, you will dissect a squid and observe parts of several body systems.
Compare and Contrast How are a gastrovascular cavity and a digestive tract different?
Review What process takes place in all respiratory structures?
Compare and Contrast What is the difference between an open and a closed circulatory system?
Preview the procedure in the lab manual.
Interpret Visuals What structure can you use to distinguish the ventral side of a squid from the dorsal side?
Infer Why is it important to lift the mantle while cutting it?
Predict What do you expect the gills to look like, and why?
Visit Chapter 27 online to test yourself on chapter content and to find activities to help you learn.
Untamed Science Video Trek carefully with the Untamed Science crew as they get up close and personal with bears to learn about their adaptations.
Art in Motion What happens when fresh and salt-water fishes excrete water or salt? Find out by watching this animation.
Art Review Review your knowledge of the different types of respiratory systems with this activity.
InterActive Art See how single- and double-loop circulation systems compare.
Data Analysis Investigate the relationship between body size, tracheal structure and the amount of atmospheric oxygen to understand why insects were larger in the Paleozoic than they are today.
Visual Analogy Compare the structure and function of the types of teeth with common objects.