Molluscs

unusual ribbon of teeth used for feeding

what do molluscs use for movement

used in molluscs for respiration

what group do molluscs belong to?

molluscs develop via _____ cleavage with _______ coelom

are molluscs a large or small animal phyla?

molluscs have a large size range but 80% are under ______

habitat of most molluscs

where does fossil evidence suggest molluscs evolved?

why are bivalves unable to leave aquatic areas?

how many germ layers in a mollusc?

molluscs that are often intermediate hosts for parasites that affect humans and domesticated animals

culturing of ______ from molluscs is an important industry around the world.

symmetry in molluscs

body wall that forms the mantle

body wall that forms the muscular foot

Surface epithelium usually _______ and bearing mucous glands and sensory nerve endings.

types of muscles in mollusc body wall

what type of circulatory system do molluscs have?

type of reproduction in snails

what does an open circulatory system mean?

area that contains the feeding, sensory, and locomotory \n organs

range from simple to complex eyes especially in \n cephalopods

Complex muscles that move radula and its supportive cartilages in and out of the mouth.

where are new rows of teeth secreted in the radula?

used in the classification of mollusc species

what secretes the shell in species that have one?

\n Mantle cavity houses the _________ that develop from the mantle and the exposed surface used in gas exchange

products of these systems empty into the mantle cavity

a sheath tissue on each side of the body that protects the soft parts and forms the space called cavity

what is the mantle a part of

In aquatic molluscs, ________ brings in oxygen and food, flushes out wastes and reproductive

how many layers typically in mollusc shell?

outer horny shell layer

next to the mantle, secreted continuously by the mantle \n surface so it increases in thickness as the animal grows; the nacre is laid down in thin wavy layers that results in \n iridescent mother-of-pearl layers in abalones and clams.

densely packed prisms of calcium carbonate; grows at the shell margin as the animal grows.

most diverse mollusc class

gastropod shells may be ________ __(__right sided) or \n _______ (left sided) in coiling formation.

smallest and oldest part of whorl

\n Many snails have _____ covering shell \n aperture (entry).

developmental process that changes the relative position of the shell, digestive tract and anus, nerves that lie on both sides of the digestive tract, and the mantle cavity \n containing the gills.

spiral winding of shell and visceral mass

venom used in cone snail radula to capture prey

Pulmonates lack gills but have highly vascular area in the mantle that serves as a lung; it opens to outside by small \n opening called _______

Most gastropods have a _____ kidney called a _______ and well-developed circulatory and nervous systems.

what do bivalves lack?

\n Bivalves are laterally compressed with two shells or valves that are held together by a ______

the oldest part of the bivalve shell with growth occurring outward in rings

what muscles draw bivalve shells together

suspended from the dorsal midline in bivalves

location of muscular foot attachment in bivalves

hang down on each side of a bivalve, covered by fold of the mantle

what muscles shorten to pull bivalves forward

how do bivalves anchor into the mud for locomocation?

how do scallops and file shells swim?

what brings oxygen and organic materials to the gills of bivalves?

secreted by gland cells to entangle food particles

direct mucous mass into mouth of bivalves

secreted by style sac and contains enzymes to aid in bivalve digestion

how many chambers in bivalve heart

in bivalves, a pair of ____ shaped kidneys called \n __________ are next to the heart.

what chambers does a bivalve heart have?

where can blood be oxygenated in bivalves?

stages of embryo development in bivalves

what type of fertilization typically occurs in bivalves

freshwater clams have _____ fertilization

specialized veligers that attach to gills of passing fish, \n where they live briefly as parasites to complete their development.

marine predators such as squids, octopuses, nautiluses, \n devilfish, and cuttlefish

what regions in cephalopods are merged and modified for expelling water

cephalopod that has completely lost the shell

living chord of tissue that connects cephalopod shell chambers to visceral mass

how do cephalopods swim?

Cephalopod nervous and sensory systems are ______ elaborate than other molluscs

largest brain of any invertebrate

cephalopods have complex eyes but are typically still ______

how are cephalopod color changes controlled?

package spermatozoa in male cephalopod seminal vesicles

intromittent organ, made from modified male arm, which is used to remove a spermatophore from the male mantle cavity and insert it into the female oviduct

do cephalopods have free-swimming larvae

what is the periostracum made of?