Page 169 - Ultimate Visual Dictionary (DK)

SPONGES, JELLYFISH, AND SEA ANEMONES

INTERNAL ANATOMY OF A JELLYFISH EXAMPLES OF
CORALS
Stomach
Filament Gonad
Ectoderm
Endoderm Mesoglea
Radial canal
HONEYCOMB CORAL
Hood (Goniastrea aspera)
Tentacle
Subgenital pit
Rhopalium
Oral arm
Mouth

EXTERNAL APPEARANCE
OF A JELLYFISH STRUCTURE OF A CNIDOCYTE Thread
Spine
Operculum MUSHROOM CORAL
Cnidocil (Fungia fungites)
Cnidocil (trigger) (trigger) Barb (stylet)
Operculum
Barb (stylet)
Thread
Nucleus Nucleus

BEFORE DISCHARGE AFTER DISCHARGE STAR CORAL
(Balanophyllia regia)

INTERNAL ANATOMY OF A
SEA ANEMONE
Oral disk Mouth Ostium (mesenteric
perforation)

Tentacle

Sphincter Collar
muscle
Siphonoglyph
Mesenteric
filament Complete
mesentery
Incomplete Retractor
mesentery muscle

Gonad

Oral disk
Gastrovascular
Basal disk Pharynx cavity
Mouth (pedal disk)

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