Radial symmetry Cnidarian Life Cycle Cnidocyte Structure and

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Radial symmetry

Radial symmetry

Cnidarian Life Cycle

Cnidarian Life Cycle

Cnidocyte Structure and Nematocyst Discharge

Cnidocyte Structure and Nematocyst Discharge

Penetrant

Penetrant

Volvent Glutinant

Volvent Glutinant

Glutinant Penetrant Volvent

Glutinant Penetrant Volvent

Nervous System • Nerve cells กระจายทวรางกายเปน net nerve

Nervous System • Nerve cells กระจายทวรางกายเปน net nerve

Hydra Body Wall Gastrovascular cavity Gastrodermis Mesoglea Epidermis

Hydra Body Wall Gastrovascular cavity Gastrodermis Mesoglea Epidermis

Epidermis Mesoglea Endodermis (gastrodermis)

Epidermis Mesoglea Endodermis (gastrodermis)

(hypostome)

(hypostome)

Chlorohydra viridissima • endosymbiont โดย zoochlorellae ในชน gastrodermis

Chlorohydra viridissima • endosymbiont โดย zoochlorellae ในชน gastrodermis

Class Hydrozoa Hydra Encapsulated embryo Ovaries Budding Spermaries Sexual cycle Asexual cycle

Class Hydrozoa Hydra Encapsulated embryo Ovaries Budding Spermaries Sexual cycle Asexual cycle

Bud

Bud

Male gonad

Male gonad

Female gonad

Female gonad

Hydra x. s.

Hydra x. s.

• Polyp ม 2 ชนดคอ 1. Hydranth เปน feeding polyp คลายไฮดราขนาดเลก ม tentacle

• Polyp ม 2 ชนดคอ 1. Hydranth เปน feeding polyp คลายไฮดราขนาดเลก ม tentacle จำนวนมาก 2. Gonangium งอกจากมมกาน hydranth กบ hydrocaulus เปน reproductive polyp - blastostyle - medusa bud - gonotheca และ gonopore

Obelia velum( (ไมม

Obelia velum( (ไมม

Obelia medusa

Obelia medusa

Class Hydrozoa Gonionemus

Class Hydrozoa Gonionemus

Class Hydrozoa Physalia spp. • Hydroid ชนด polymorphic colony • Pneumatophore ectoderm ในระยะตวออน •

Class Hydrozoa Physalia spp. • Hydroid ชนด polymorphic colony • Pneumatophore ectoderm ในระยะตวออน • Coenosarc (cormidia( เปลยนแปลงจาก ม gas gland สรางแกส งอก • Cormidia ประกอบดวย polyp เปนกลม polyp มากกวา 2

Polyp

Polyp

Class Hydrozoa Porpita spp. • colony เปนทนลอยกลมแบน • ใตทนม polyp 3 แบบคอ - gastrozooid

Class Hydrozoa Porpita spp. • colony เปนทนลอยกลมแบน • ใตทนม polyp 3 แบบคอ - gastrozooid ตรงกลาง - gonozooid รอบ gastrozooid - dactylozooid ขอบทนลอย

Statocyst Ephyra stage

Statocyst Ephyra stage

Aurelia Life Cycle

Aurelia Life Cycle

Aurelia Mesoglea Eggs Gastrovascular cavity Mouth

Aurelia Mesoglea Eggs Gastrovascular cavity Mouth

Oral arm Mouth Gastric pouch Aurelia

Oral arm Mouth Gastric pouch Aurelia

Class Cubozoa Gonad Tentacle Pedalium

Class Cubozoa Gonad Tentacle Pedalium

Class Anthozoa

Class Anthozoa

Class Anthozoa Metridium Tentacle Mouth Pharynx Septum Gastrovascular cavity

Class Anthozoa Metridium Tentacle Mouth Pharynx Septum Gastrovascular cavity

Symbiosis

Symbiosis

Class Anothozoa Corals

Class Anothozoa Corals

Class Anothozoa Sea Fan • Endoskeleton แทงแกนเปน สาร gorgonin • รอบแกนม Ca. CO 3

Class Anothozoa Sea Fan • Endoskeleton แทงแกนเปน สาร gorgonin • รอบแกนม Ca. CO 3 spicule • สสนเปนของ spicule

Class Anthozoa Sea Whip

Class Anthozoa Sea Whip

Soft coral • Endoskeleton ม spicule กระจายในเนอเยอ

Soft coral • Endoskeleton ม spicule กระจายในเนอเยอ

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