Outline for Zoology Lab-Invertebrates (2)

This & 1 are on bonus quiz

Protostomes

in platyhelminthes; first opening during embryonic development becomes the mouth

Cephalization

also in platyhelminthes; development of headlike & brain formation

Eyespots in platyhelminthes

allow the presence and intensity of light to be determine

How & where in the body can humans be infected by flukes?

by consuming raw fish (sushi); in the liver

How & where in the body can humans be infected with tapeworms?

consuming beef or pork with low/little cooking temperature; small intestines

Scolex

used for attachment

Proglottids

contain M&F sex organs; production eggs

Digestive tract in mollusca

complete

Circulatory system in mollusca

hemolymph; open system except cephalopods

Where is cephalization (head development) first seen?

in Platyhelminthes

Chiton

eight dorsal plates on shell

Radula

rough, tongue-like organ that helps snails scrape algae off rocks/vegetation

Adductor muscles

in clams; protect themselves from predators, survive low tide, and maintain their position in the substrate. 

Picture of abalone

Bivalves

two shells together; clams, oysters, mussels, scallops

What part of the scallops are eaten?

adducter muscle; used to open

Cephalopods

octopus, nautilus, & squid

Picture of octopus

no shell

Picture of nautilus

divisions; external shell

What system of the cephalopods is advanced?

Nervous

What kind of circulatory system do cephalopods have?

closed; distinct blood vessels