Chapter 29 Vocabulary

Trochophore

another feature shared by mollusks and annelids is a larval stage which develops from the fertilized egg.

Visceral Mass

is a central section that contains the mollusks organs.

Mantle

is a heavy fold of tissue that forms the outer layer of the body.

Foot

Every mollusk has a muscular region which is used primarily for locomotion.

Radula

a tongue like organ located in their mouth.

Nephridia

the beating of cilia pulls the fluid from the coelom into tiny tubular structures.

Adductor Muscles

2 thick muscles that joins the 2 valves in mollusks and that causes the shell to open.

Siphons

a hollow tube of bivalves used for sucking in an expelling sea water.

Cerebral Ganglion

_________or primitive brain is located in one anterior segment.

Septa

internal body walls, separate the segments of most annelids.

Setae

one of the external bristles or spines that project from the body of an annelid.

Parapodia

in the polychaetes, one of the two appendages that are used for locomotion or gas exchange.

Trochophore

another feature shared by mollusks and annelids is a larval stage which develops from the fertilized egg.

Visceral Mass

is a central section that contains the mollusks organs.

Mantle

is a heavy fold of tissue that forms the outer layer of the body.

Foot

Every mollusk has a muscular region which is used primarily for locomotion.

Radula

a tongue like organ located in their mouth.

Nephridia

the beating of cilia pulls the fluid from the coelom into tiny tubular structures.

Adductor Muscles

2 thick muscles that joins the 2 valves in mollusks and that causes the shell to open.

Siphons

a hollow tube of bivalves used for sucking in an expelling sea water.

Cerebral Ganglion

_________or primitive brain is located in one anterior segment.

Septa

internal body walls, separate the segments of most annelids.

Setae

one of the external bristles or spines that project from the body of an annelid.

Parapodia

in the polychaetes, one of the two appendages that are used for locomotion or gas exchange.