Mollusca
The process undergone by a mollusc when its visceral mass rotates 180 degrees during development, resulting in looping of the digestive tract.
These chitinous bristles, used to create friction for locomotion, are the namesake of many segmented marine worms.
What are chaetae?
A type of gas exchange system defined by blood moving in from high to low concentrations of gas, and water moving out from low to high concentrations.
What is countercurrent exchange?
What is cryptobiosis?
Often used synonymously with appendage, this term more accurately describes jointed segmented legs.
What is an article?
This muscular part of a mollusc may be used in crawling, burrowing, cleaning, secreting, or grabbing depending on the species.
What is the foot?
This tagmatized region of an annelid contains its eyes, antannae, feeding palps, and brain.
What is the prostomium?
This kind of feeding is neither raptorial nor filter, and comes in two flavors: selective and nonselective.
What is deposit feeding?
This kind of nervation allows for careful control of striated muscle in arthropods.
What is polyneuronal?
The branching of articles, such as into exo- and endopodites.
What is biramous?
A backwards-facing ribbon of chitin and protein with two rows of teeth located on top of the odontiphore.
What is a radula?
The budding off of gamete-producing segments into the water column, where they are externally fertilized to produce trocophore larvae.
What is epitoky?
This blood respiratory protein is found in open circulatory systems and gets part of its name from a familiar body fluid.
What is hemolymph?
These two antagonistic muscles work together to bend jointed segmented articles.
What are flexor and extensor?
These colorful secreters are responsible for osmoregulation in crustaceans.
What are green glands?
What are ctenidia?
Annelids rely on metamerism combined with a coelom to create this kind of efficient movement.
What is a peristaltic wave?
This category of metazoan (introduced for the last exam) serves as a a plesiomorph for molluscs, annelids, and arthropods.
What is a protostome?
These two biological macromolecules make up most of an arthropod's chitinous exoskeleton.
This organ works with the cardiac and pyloric stomachs to digest a crustacean's food by grinding down prey.
What is a gastric mill?
What are ganglia?
The layer that secretes septa, thin tissue layers responsible for annelid segmentation.
What is the mesoderm peritoneum?
The definition of "-pod", as in gastropod, cephalopod, copepod, arthropod...
What is a foot?
The hardening of an exoskeleton with cross-linked proteins; often occurs during the second-to-last step of ecdysis.
What is sclerotization?
Crabs can be distinguished from shrimp by looking at these five key traits.
What are body length (short vs long), abdomen position (under vs next to thorax), uropods (not present vs present), pleopod uses (reproduction only vs reproduction, movement, and respiration), and claw size (big vs small)?