SlideShare a Scribd company logo
PHYLUM
ECHINODERMATA
Echinoderms: Sea stars, brittle stars, feather stars, sea cucumbers, sea
urchins
CHARACTERISTICS
• Radial symmetry
• Several arms (5 or
more, mostly grouped 2 left- 1
middle- 2 right) radiating from
a central body.
• Body consist of equal
segments, each containing a
duplicate of various internal
organs.
CHARACTERISTICS

• No brain nor hearts
• With eyespots on each arm
• Mouth situated on the
underside and anus on top
(except feather stars, sea
cucumbers and some urchins).
• Contains tube feet with suction
pads controlled by water
vascular system.
CHARACTERISTICS
• Some are carnivorous
while others are detritus
foragers.
• Reproduction is through
release of sperms and egg
into the water.
• Capable of regeneration
and fragmentation.
TYPES OF ECHINODERMS

•Class Asteroidea
•Class Ophiurodea
•Class Echinoidea
•Class Holothuroidea
•Class Crinoidea
WHAT IS THIS?
• Cushion starfish (Culcita nouvaeguineae)
CLASS ASTEROIDEA

• Carnivorous and feed on sponges and
molluscs some are specialized
feeders.(crown of thorns)
• Doesn’t have hard mouth parts to help
them capture prey.
TRIVIA
• Crown of thorns (Acanthaster planci)
• One of the largest and the most venomous
starfish.
• Size reaches up to 50 cm in diameter.
• 10 to 20 spiny arms with formidable thorn like toxic
spines
• Feed on coral polyps
• Predators: Triton shell and some puffer fish
CROWN OF THORNS
(ACANTHASTER PLANCI)
CLASS OPHIUROIDEA
• Close relatives of sea stars
• Have five snakelike arms which
are highly flexible.
• No replication of internal
organs, just one set in the central
disk.
• Smaller central disk and no anus.
• Arms of brittle stars
are fragile. ( Defense
Mechanism)
• Most active and
fastest moving
echinoderms
• Feed on plankton but
also on detritus.
• Serpent Stars
• Coiled snakelike
around branches of
gorgonians.
TRIVIA
• Basket stars
• Specialized type of brittle
stars

(Astroglymma sculptum)
CLASS ECHINOIDEA
Sea urchins
• External chitinous skeleton
and a centrally located jaw
• Some have speherical bulblike cloaca.
• Movable spines are attached
to the body, some are
venomous
• Locomotion by tube feet
but also by movement of
the spines on the underside
of the body.
• Generally nocturnal
• Most are algal grazers but
some feed on sponges and
detritus.
CLASS HOLOTHUROIDEA
• Don’t have radial symmetry
but are bilateral.
• Cucumber shaped with
elongated muscular, flexible
body with mouth at one end
anus on the other.
• Tentacles present in the
mouth for food collection
• Feed on rich organic film
coating sandy surfaces.
• Crawl over the bottom
and ingest sand.
• Move by means of tube
feet.
• Releases its digestive tract
when threatened (defense
mechanism)
PHYLUM CRINOIDEA
• Radial symmetry
• Cup-shaped body
• Numerous feathery arms project from a central
disc.
• Have 5 up to 200 arms (pinnules)
• Nocturnal
• Usually cling to sponges.
FEATHER STARS
• Source: http://www.starfish.ch/reef/echinoderms.html#starfish

More Related Content

What's hot

phylum mollusca
phylum molluscaphylum mollusca
phylum mollusca
Cara Molina
 
Phylum Cnidaria presentation
Phylum Cnidaria presentationPhylum Cnidaria presentation
Phylum Cnidaria presentation
AnzaDar3
 
Phylum cnidaria
Phylum cnidariaPhylum cnidaria
Phylum cnidaria
Jessi Dildy
 
Phylum mollusca
Phylum molluscaPhylum mollusca
Phylum mollusca
أسعد لحمر
 
Phylum Mollusca
Phylum MolluscaPhylum Mollusca
Phylum Mollusca
mcdevittapbio
 
Phylum Annelida
Phylum AnnelidaPhylum Annelida
Phylum Annelida
Erin Nash
 
Echinoderm powerpoint
Echinoderm powerpointEchinoderm powerpoint
Echinoderm powerpoint
Smithtown High School West
 
Mollusca
MolluscaMollusca
Mollusca
Shah Naseer
 
Phylum Cnidaria
Phylum CnidariaPhylum Cnidaria
Phylum Cnidaria
Mark Casabuena
 
Mollusca general characters and classification
Mollusca general characters and classificationMollusca general characters and classification
Mollusca general characters and classification
Ashokkumar Bollapalli
 
Phylum Mollusca
Phylum MolluscaPhylum Mollusca
Phylum Mollusca
Navya Sasha
 
Chordata
Chordata Chordata
Birds
BirdsBirds
Reptiles
ReptilesReptiles
Reptiles
clarot16
 
Phylum Arthropoda
Phylum ArthropodaPhylum Arthropoda
Phylum Arthropoda
osang0908
 
Phylum echinodermata 2016
Phylum echinodermata 2016Phylum echinodermata 2016
Phylum echinodermata 2016
Jessi Dildy
 
17. Class Chondrichthyes Notes
17. Class Chondrichthyes Notes17. Class Chondrichthyes Notes
17. Class Chondrichthyes Notes
mgitterm
 
Mollusca general characters
Mollusca general charactersMollusca general characters
Mollusca general characters
Ashokkumar Bollapalli
 
Phylum annelida 2016
Phylum annelida 2016Phylum annelida 2016
Phylum annelida 2016
Jessi Dildy
 
Pisces classication ppt
Pisces classication pptPisces classication ppt
Pisces classication ppt
bhavnesthakur
 

What's hot (20)

phylum mollusca
phylum molluscaphylum mollusca
phylum mollusca
 
Phylum Cnidaria presentation
Phylum Cnidaria presentationPhylum Cnidaria presentation
Phylum Cnidaria presentation
 
Phylum cnidaria
Phylum cnidariaPhylum cnidaria
Phylum cnidaria
 
Phylum mollusca
Phylum molluscaPhylum mollusca
Phylum mollusca
 
Phylum Mollusca
Phylum MolluscaPhylum Mollusca
Phylum Mollusca
 
Phylum Annelida
Phylum AnnelidaPhylum Annelida
Phylum Annelida
 
Echinoderm powerpoint
Echinoderm powerpointEchinoderm powerpoint
Echinoderm powerpoint
 
Mollusca
MolluscaMollusca
Mollusca
 
Phylum Cnidaria
Phylum CnidariaPhylum Cnidaria
Phylum Cnidaria
 
Mollusca general characters and classification
Mollusca general characters and classificationMollusca general characters and classification
Mollusca general characters and classification
 
Phylum Mollusca
Phylum MolluscaPhylum Mollusca
Phylum Mollusca
 
Chordata
Chordata Chordata
Chordata
 
Birds
BirdsBirds
Birds
 
Reptiles
ReptilesReptiles
Reptiles
 
Phylum Arthropoda
Phylum ArthropodaPhylum Arthropoda
Phylum Arthropoda
 
Phylum echinodermata 2016
Phylum echinodermata 2016Phylum echinodermata 2016
Phylum echinodermata 2016
 
17. Class Chondrichthyes Notes
17. Class Chondrichthyes Notes17. Class Chondrichthyes Notes
17. Class Chondrichthyes Notes
 
Mollusca general characters
Mollusca general charactersMollusca general characters
Mollusca general characters
 
Phylum annelida 2016
Phylum annelida 2016Phylum annelida 2016
Phylum annelida 2016
 
Pisces classication ppt
Pisces classication pptPisces classication ppt
Pisces classication ppt
 

Similar to Echinoderms

Lecture 10 echinodermata
Lecture 10   echinodermata                Lecture 10   echinodermata
Lecture 10 echinodermata
AnzaDar3
 
A survery of kingdom animalia
A survery of kingdom animaliaA survery of kingdom animalia
A survery of kingdom animalia
Peter Egorov
 
WK5 INVERTEBRATES.ppt
WK5 INVERTEBRATES.pptWK5 INVERTEBRATES.ppt
WK5 INVERTEBRATES.ppt
KimberlyValdez19
 
Invertebrates
InvertebratesInvertebrates
Invertebrates
InvertebratesInvertebrates
Invertebrates
sirkoky
 
Animal kingdom
Animal kingdomAnimal kingdom
Animal kingdom
luchislinda
 
Invertebrates
InvertebratesInvertebrates
Biology - Chp 26 - Animals - PowerPoint
Biology - Chp 26 - Animals - PowerPointBiology - Chp 26 - Animals - PowerPoint
Biology - Chp 26 - Animals - PowerPoint
Mel Anthony Pepito
 
Lecture 7 ( phylum mollusca) ... ppt
Lecture   7  ( phylum mollusca) ... pptLecture   7  ( phylum mollusca) ... ppt
Lecture 7 ( phylum mollusca) ... ppt
AnzaDar3
 
Whittakers 5 kingdom classification.pptx
Whittakers 5 kingdom classification.pptxWhittakers 5 kingdom classification.pptx
Whittakers 5 kingdom classification.pptx
AshwinReddyPachika1
 
Simple invertebrates
Simple invertebratesSimple invertebrates
Simple invertebrates
jdrinks
 
Animal kingdom All Phylum for NEB Board NEPAL
Animal kingdom All Phylum  for NEB Board NEPALAnimal kingdom All Phylum  for NEB Board NEPAL
Animal kingdom All Phylum for NEB Board NEPAL
Sudhir singh
 
Animals
AnimalsAnimals
Animals
davmartse
 
Class xi ch 4
Class xi ch 4Class xi ch 4
Class xi ch 4
RashmiSinha61
 
Kingdom animalia
Kingdom animaliaKingdom animalia
Kingdom animalia
Mara Luarte
 
INVERTEBRATES Annelida.pdf
INVERTEBRATES  Annelida.pdfINVERTEBRATES  Annelida.pdf
INVERTEBRATES Annelida.pdf
NabeelTahir23
 
Diversity of life ii lecture 4
Diversity of life ii lecture 4Diversity of life ii lecture 4
Diversity of life ii lecture 4
AsherTakudzwaMutepfe
 
ZL 121 Lecture 6 Cnidaria_Ctenophora(1)(1).ppt
ZL 121 Lecture 6 Cnidaria_Ctenophora(1)(1).pptZL 121 Lecture 6 Cnidaria_Ctenophora(1)(1).ppt
ZL 121 Lecture 6 Cnidaria_Ctenophora(1)(1).ppt
Goodruck
 
Introduction to animals
Introduction to animalsIntroduction to animals
Introduction to animals
bruceewing
 
Animal Biology.pdf
Animal Biology.pdfAnimal Biology.pdf
Animal Biology.pdf
RainVincentLaruscain
 

Similar to Echinoderms (20)

Lecture 10 echinodermata
Lecture 10   echinodermata                Lecture 10   echinodermata
Lecture 10 echinodermata
 
A survery of kingdom animalia
A survery of kingdom animaliaA survery of kingdom animalia
A survery of kingdom animalia
 
WK5 INVERTEBRATES.ppt
WK5 INVERTEBRATES.pptWK5 INVERTEBRATES.ppt
WK5 INVERTEBRATES.ppt
 
Invertebrates
InvertebratesInvertebrates
Invertebrates
 
Invertebrates
InvertebratesInvertebrates
Invertebrates
 
Animal kingdom
Animal kingdomAnimal kingdom
Animal kingdom
 
Invertebrates
InvertebratesInvertebrates
Invertebrates
 
Biology - Chp 26 - Animals - PowerPoint
Biology - Chp 26 - Animals - PowerPointBiology - Chp 26 - Animals - PowerPoint
Biology - Chp 26 - Animals - PowerPoint
 
Lecture 7 ( phylum mollusca) ... ppt
Lecture   7  ( phylum mollusca) ... pptLecture   7  ( phylum mollusca) ... ppt
Lecture 7 ( phylum mollusca) ... ppt
 
Whittakers 5 kingdom classification.pptx
Whittakers 5 kingdom classification.pptxWhittakers 5 kingdom classification.pptx
Whittakers 5 kingdom classification.pptx
 
Simple invertebrates
Simple invertebratesSimple invertebrates
Simple invertebrates
 
Animal kingdom All Phylum for NEB Board NEPAL
Animal kingdom All Phylum  for NEB Board NEPALAnimal kingdom All Phylum  for NEB Board NEPAL
Animal kingdom All Phylum for NEB Board NEPAL
 
Animals
AnimalsAnimals
Animals
 
Class xi ch 4
Class xi ch 4Class xi ch 4
Class xi ch 4
 
Kingdom animalia
Kingdom animaliaKingdom animalia
Kingdom animalia
 
INVERTEBRATES Annelida.pdf
INVERTEBRATES  Annelida.pdfINVERTEBRATES  Annelida.pdf
INVERTEBRATES Annelida.pdf
 
Diversity of life ii lecture 4
Diversity of life ii lecture 4Diversity of life ii lecture 4
Diversity of life ii lecture 4
 
ZL 121 Lecture 6 Cnidaria_Ctenophora(1)(1).ppt
ZL 121 Lecture 6 Cnidaria_Ctenophora(1)(1).pptZL 121 Lecture 6 Cnidaria_Ctenophora(1)(1).ppt
ZL 121 Lecture 6 Cnidaria_Ctenophora(1)(1).ppt
 
Introduction to animals
Introduction to animalsIntroduction to animals
Introduction to animals
 
Animal Biology.pdf
Animal Biology.pdfAnimal Biology.pdf
Animal Biology.pdf
 

More from joevani_007

Phylum Chordata: Fishes
Phylum Chordata: FishesPhylum Chordata: Fishes
Phylum Chordata: Fishes
joevani_007
 
Kingdom protista
Kingdom protistaKingdom protista
Kingdom protista
joevani_007
 
Reptiles
ReptilesReptiles
Reptiles
joevani_007
 
Class Mammalia
Class MammaliaClass Mammalia
Class Mammalia
joevani_007
 
Class Aves
Class AvesClass Aves
Class Aves
joevani_007
 
Root shoot system
Root shoot systemRoot shoot system
Root shoot system
joevani_007
 
Arthropods
ArthropodsArthropods
Arthropods
joevani_007
 
Microscope parts and functions
Microscope parts and functionsMicroscope parts and functions
Microscope parts and functions
joevani_007
 
Clostridium tetani
Clostridium tetaniClostridium tetani
Clostridium tetani
joevani_007
 
Cell structures and functions
Cell structures and functionsCell structures and functions
Cell structures and functions
joevani_007
 
Cell discovery & cell theory
Cell discovery & cell theoryCell discovery & cell theory
Cell discovery & cell theory
joevani_007
 
Different movement across plasma membrane
Different movement across plasma membraneDifferent movement across plasma membrane
Different movement across plasma membrane
joevani_007
 

More from joevani_007 (12)

Phylum Chordata: Fishes
Phylum Chordata: FishesPhylum Chordata: Fishes
Phylum Chordata: Fishes
 
Kingdom protista
Kingdom protistaKingdom protista
Kingdom protista
 
Reptiles
ReptilesReptiles
Reptiles
 
Class Mammalia
Class MammaliaClass Mammalia
Class Mammalia
 
Class Aves
Class AvesClass Aves
Class Aves
 
Root shoot system
Root shoot systemRoot shoot system
Root shoot system
 
Arthropods
ArthropodsArthropods
Arthropods
 
Microscope parts and functions
Microscope parts and functionsMicroscope parts and functions
Microscope parts and functions
 
Clostridium tetani
Clostridium tetaniClostridium tetani
Clostridium tetani
 
Cell structures and functions
Cell structures and functionsCell structures and functions
Cell structures and functions
 
Cell discovery & cell theory
Cell discovery & cell theoryCell discovery & cell theory
Cell discovery & cell theory
 
Different movement across plasma membrane
Different movement across plasma membraneDifferent movement across plasma membrane
Different movement across plasma membrane
 

Recently uploaded

বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdfবাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
eBook.com.bd (প্রয়োজনীয় বাংলা বই)
 
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
spot a liar (Haiqa 146).pptx Technical writhing and presentation skillsspot a liar (Haiqa 146).pptx Technical writhing and presentation skills
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
haiqairshad
 
The basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptxThe basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptx
heathfieldcps1
 
A Independência da América Espanhola LAPBOOK.pdf
A Independência da América Espanhola LAPBOOK.pdfA Independência da América Espanhola LAPBOOK.pdf
A Independência da América Espanhola LAPBOOK.pdf
Jean Carlos Nunes Paixão
 
clinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdfclinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdf
Priyankaranawat4
 
Temple of Asclepius in Thrace. Excavation results
Temple of Asclepius in Thrace. Excavation resultsTemple of Asclepius in Thrace. Excavation results
Temple of Asclepius in Thrace. Excavation results
Krassimira Luka
 
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxBeyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
EduSkills OECD
 
How to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 InventoryHow to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 Inventory
Celine George
 
writing about opinions about Australia the movie
writing about opinions about Australia the moviewriting about opinions about Australia the movie
writing about opinions about Australia the movie
Nicholas Montgomery
 
Leveraging Generative AI to Drive Nonprofit Innovation
Leveraging Generative AI to Drive Nonprofit InnovationLeveraging Generative AI to Drive Nonprofit Innovation
Leveraging Generative AI to Drive Nonprofit Innovation
TechSoup
 
Solutons Maths Escape Room Spatial .pptx
Solutons Maths Escape Room Spatial .pptxSolutons Maths Escape Room Spatial .pptx
Solutons Maths Escape Room Spatial .pptx
spdendr
 
Mule event processing models | MuleSoft Mysore Meetup #47
Mule event processing models | MuleSoft Mysore Meetup #47Mule event processing models | MuleSoft Mysore Meetup #47
Mule event processing models | MuleSoft Mysore Meetup #47
MysoreMuleSoftMeetup
 
math operations ued in python and all used
math operations ued in python and all usedmath operations ued in python and all used
math operations ued in python and all used
ssuser13ffe4
 
Walmart Business+ and Spark Good for Nonprofits.pdf
Walmart Business+ and Spark Good for Nonprofits.pdfWalmart Business+ and Spark Good for Nonprofits.pdf
Walmart Business+ and Spark Good for Nonprofits.pdf
TechSoup
 
IGCSE Biology Chapter 14- Reproduction in Plants.pdf
IGCSE Biology Chapter 14- Reproduction in Plants.pdfIGCSE Biology Chapter 14- Reproduction in Plants.pdf
IGCSE Biology Chapter 14- Reproduction in Plants.pdf
Amin Marwan
 
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPLAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
RAHUL
 
Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...
PsychoTech Services
 
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem studentsRHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
Himanshu Rai
 
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptxPrésentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
siemaillard
 
Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh - RAYH...
Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh - RAYH...Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh - RAYH...
Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh - RAYH...
imrankhan141184
 

Recently uploaded (20)

বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdfবাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
 
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
spot a liar (Haiqa 146).pptx Technical writhing and presentation skillsspot a liar (Haiqa 146).pptx Technical writhing and presentation skills
spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
 
The basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptxThe basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptx
 
A Independência da América Espanhola LAPBOOK.pdf
A Independência da América Espanhola LAPBOOK.pdfA Independência da América Espanhola LAPBOOK.pdf
A Independência da América Espanhola LAPBOOK.pdf
 
clinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdfclinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdf
 
Temple of Asclepius in Thrace. Excavation results
Temple of Asclepius in Thrace. Excavation resultsTemple of Asclepius in Thrace. Excavation results
Temple of Asclepius in Thrace. Excavation results
 
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxBeyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptx
 
How to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 InventoryHow to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 Inventory
 
writing about opinions about Australia the movie
writing about opinions about Australia the moviewriting about opinions about Australia the movie
writing about opinions about Australia the movie
 
Leveraging Generative AI to Drive Nonprofit Innovation
Leveraging Generative AI to Drive Nonprofit InnovationLeveraging Generative AI to Drive Nonprofit Innovation
Leveraging Generative AI to Drive Nonprofit Innovation
 
Solutons Maths Escape Room Spatial .pptx
Solutons Maths Escape Room Spatial .pptxSolutons Maths Escape Room Spatial .pptx
Solutons Maths Escape Room Spatial .pptx
 
Mule event processing models | MuleSoft Mysore Meetup #47
Mule event processing models | MuleSoft Mysore Meetup #47Mule event processing models | MuleSoft Mysore Meetup #47
Mule event processing models | MuleSoft Mysore Meetup #47
 
math operations ued in python and all used
math operations ued in python and all usedmath operations ued in python and all used
math operations ued in python and all used
 
Walmart Business+ and Spark Good for Nonprofits.pdf
Walmart Business+ and Spark Good for Nonprofits.pdfWalmart Business+ and Spark Good for Nonprofits.pdf
Walmart Business+ and Spark Good for Nonprofits.pdf
 
IGCSE Biology Chapter 14- Reproduction in Plants.pdf
IGCSE Biology Chapter 14- Reproduction in Plants.pdfIGCSE Biology Chapter 14- Reproduction in Plants.pdf
IGCSE Biology Chapter 14- Reproduction in Plants.pdf
 
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPLAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
 
Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...
 
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem studentsRHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
 
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptxPrésentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
 
Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh - RAYH...
Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh - RAYH...Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh - RAYH...
Traditional Musical Instruments of Arunachal Pradesh and Uttar Pradesh - RAYH...
 

Echinoderms

  • 1. PHYLUM ECHINODERMATA Echinoderms: Sea stars, brittle stars, feather stars, sea cucumbers, sea urchins
  • 2. CHARACTERISTICS • Radial symmetry • Several arms (5 or more, mostly grouped 2 left- 1 middle- 2 right) radiating from a central body. • Body consist of equal segments, each containing a duplicate of various internal organs.
  • 3. CHARACTERISTICS • No brain nor hearts • With eyespots on each arm • Mouth situated on the underside and anus on top (except feather stars, sea cucumbers and some urchins). • Contains tube feet with suction pads controlled by water vascular system.
  • 4. CHARACTERISTICS • Some are carnivorous while others are detritus foragers. • Reproduction is through release of sperms and egg into the water. • Capable of regeneration and fragmentation.
  • 5. TYPES OF ECHINODERMS •Class Asteroidea •Class Ophiurodea •Class Echinoidea •Class Holothuroidea •Class Crinoidea
  • 7. • Cushion starfish (Culcita nouvaeguineae)
  • 8. CLASS ASTEROIDEA • Carnivorous and feed on sponges and molluscs some are specialized feeders.(crown of thorns) • Doesn’t have hard mouth parts to help them capture prey.
  • 9. TRIVIA • Crown of thorns (Acanthaster planci) • One of the largest and the most venomous starfish. • Size reaches up to 50 cm in diameter. • 10 to 20 spiny arms with formidable thorn like toxic spines • Feed on coral polyps • Predators: Triton shell and some puffer fish
  • 11. CLASS OPHIUROIDEA • Close relatives of sea stars • Have five snakelike arms which are highly flexible. • No replication of internal organs, just one set in the central disk. • Smaller central disk and no anus.
  • 12. • Arms of brittle stars are fragile. ( Defense Mechanism) • Most active and fastest moving echinoderms • Feed on plankton but also on detritus.
  • 13. • Serpent Stars • Coiled snakelike around branches of gorgonians.
  • 14. TRIVIA • Basket stars • Specialized type of brittle stars (Astroglymma sculptum)
  • 15. CLASS ECHINOIDEA Sea urchins • External chitinous skeleton and a centrally located jaw • Some have speherical bulblike cloaca. • Movable spines are attached to the body, some are venomous
  • 16. • Locomotion by tube feet but also by movement of the spines on the underside of the body. • Generally nocturnal • Most are algal grazers but some feed on sponges and detritus.
  • 17.
  • 18.
  • 19. CLASS HOLOTHUROIDEA • Don’t have radial symmetry but are bilateral. • Cucumber shaped with elongated muscular, flexible body with mouth at one end anus on the other. • Tentacles present in the mouth for food collection
  • 20. • Feed on rich organic film coating sandy surfaces. • Crawl over the bottom and ingest sand. • Move by means of tube feet. • Releases its digestive tract when threatened (defense mechanism)
  • 21.
  • 22. PHYLUM CRINOIDEA • Radial symmetry • Cup-shaped body • Numerous feathery arms project from a central disc. • Have 5 up to 200 arms (pinnules) • Nocturnal • Usually cling to sponges.