Simple Sponge

• epidermal cell
• gelatinous layer
• amoebocyte
• spicule
• collar cell
• incurrent pore cell
• spongocoel
• osculum

 Advanced Sponge

• epidermal cell
• incurrent pore
• gelatinous layer
• amoebocyte
• spicule
• collar cell
• gastrodermis
• incurrent opening
• incurrent canal
• radial canal
• spongocoel
• osculum

 Sea Anemone

• oral disc
• tentacles
• mouth
• ostium
• column
• pharynx
• siphonoglyph
• gonads
• septal filaments
• acontia
• pedal disc
• circular muscle
• longitudinal muscle

   Sea Anemone-Cross Section

• gastrovascular cavity
• complete septa
• incomplete septa
• epidermis
• mesoglea
• gastrodermis

 Clam External Structures

• outer layer
• mother of pearl layer
• hinge ligament
• pallial line
• anterior adductor muscles
• anterior retractor muscles
• anerior scar
• foot
• posterior adductor muscles
• posterior retractor muscles
• mantle
• visceral mass
• gill pair
• suprabranchial chamber
• incurrent siphon
• excurrent siphon
• mouth
• labial palp

 Clam Digestive System

• mouth
• labial palp
• esophagus
• stomach
• style sac
• digestive gland
• intestine
• rectum
• anus
• pericardial sac
• nephridium
• bladder
• suprabranchial chamber
• excurrent siphon

 Clam Circulatory System

• pericardial cavity
• auricle
• ventricle
• anterior aorta
• artery to viscera
• artery to mantle
• artery to foot
• posterior aorta
• posterior artery to mantle
• veins of nephridium
• vein to gill
• suprabranchial chamber

 Clam Nervous System

• cerebral ganglia
• visceral ganglia
• pedal ganglia
• nerve trunk
• sensory receptor
• sensory nerve
• motor nerve

 Sea Star - External Structures

• aboral surface
• spine
• dermal gills
• anus
• tentacle
• oral surface
• ambulacral groove
• mouth
• madreporite
• stone canal
• ring canal
• radial canal
• lateral canal
• ampulla
• tube feet

 Sea Star - Internal Structures

• epidermis
• pedicellaria
• calcareous skeleton
• spine
• connective tissue
• muscle layer
• parietal peritoneum
• visceral peritoneum
• coelom
• dermal gill
• ampulla
• cavity
• suction disc
• cardiac stomach
• pyloric stomach
• pyloric cecum