Lab 8: Invertebrate Anatomy Flashcards
Which two phyla encompass much of the morphological, ecological, and species diversity within the clade Bilateria.
Mollusca and Arthropoda
Two phyla (Mollusca and Arthropoda) encompass much of the morphological, ecological, and species diversity within the clade __________.
Bilateria
Mouth develops from the blastopore.
Protostome
Mollusca and Arthropoda are __________ groups.
Protostome
Mollusca and Arthropoda have very different __________ and __________ systems.
Musculoskeletal and circulatory
The Mollusca belong to the __________.
Lophotrochozoa
The Arthropoda belong to the __________.
Ecdysozoa
Mollusca comes from the Latin “molluscus” meaning:
Soft
A __________ covers the internal organs of Cephalopods.
Mantle
The shell has been __________ and __________ in the squid.
Reduced, internalized
The __________ __________ has been modified in cephalopods into the tentacles, parts of the head, and a muscular excurrent siphon.
Muscular foot
Arthropoda comes from the Greek arthropod meaning __________ __________.
“Jointed feet”
Arthropods have hard __________.
Exoskeletons
Today’s lab will examine the __________.
Crayfish
Branched.
Biramous
Crustaceans are known for their serially __________, __________ appendages that have been extensively modified to perform specialized tasks.
Homologous, biramous
__________ are the only Arthropods with 2 pairs of antennae.
Crustaceans
Squid also have a separate __________ __________ which lies directly between the gills.
Systemic heart
The __________ and __________ comprise the squid’s skeleton.
Gladius, cranium
The __________ is the long, translucent, plastic-like structure that runs the length of the body and supports the mantle and internal organs.
Gladius
Looks like a long, dark tube that opens near the funnel.
Ink sac
Running parallel to the ink sac is the __________ which ends at the __________.
Intestine, anus
The large white mass located at the posterior end of the mantle.
Caecum
The __________ lies anterior to the caecum and contains visible folds; it looks like a piece of chewing gum.
Stomach
Structures within an organism exhibit __________ __________ if the structures are repeated and have similar developmental organs.
Serial homology
Walking legs
Periopods
