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David Huang Situ

MOLLUSKS:
Characteristic:
- They are mostly found in marine and freshwater.
- They exhibit organ system level of organization.
- The head is composed of antennae and compound eyes.

Classification:
- Gastropods
- Bivalves
- Cephalopods

ECHINODERMS:
Characteristic:
- They have a star-like appearance and are spherical or elongated.
- They are exclusively marine animals.
- The organisms are spiny-skinned.

Classification:
- Crinoidea
- Asteroidea
- Ophiuroidea
- Echinoidea
- Holothuroidea

ANNELIDS:
Characteristic:
- The Annelids are coelomate and triploblastic.
- They exhibit organ system level organization.
- Their body is segmented.

Classification:
- Earthworm
- Leeches
- Lugworms
-Polychaetes

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MARCELA LEVERÓN
10TH
CHARACTERISTICS OF MOLLUSKS:

Unsegmented soft body with bilateral symmetry.

Presence of an internal or external shell.

A mantle which is a fold in the body wall that lines the shell.

CLASSIFICATION:

Gastropoda

Bivalvia

Aplacophora

Polyplacophora

Scaphopoda

CHARACTERISTICS OF ECHINODERMS:

They have a star-like appearance and are spherical or elongated.

The organisms are spiny-skinned.

The skeleton is made up of calcium carbonate.

CLASSIFICATION:

Asteroidea

Ophiuroidea

Echinoidea

Holothuroidea

Crinoidea

CHARACTERISTICS OF ANNELIDS:

They have homonomous metamerically segmented body.

They are mostly aquatic but some are terrestrial.

They have red colored body due to the presence of haemoglobin in blood.

CLASSIFICATION:

Polychaeta

Oligochaeta

Hirudinea

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Grecia Melgar
Characteristics of Mollusks

Most of the mollusks live in water but some live on land.

They use the ventral muscular foot for locomotion.

Usually they have an external or internal shell.

Classification of Mollusks

Gastropods

Bivalvia

Scaphopoda

Polyplacophoran

Cephalopoda

Characteristics of Echinoderms

Echinoderms exhibit a great diversity of body forms, especially among the extinct groups.

All existing echinoderms are marine.

Some of them have small hair-like spines, like the starfish.

Classification of Echinoderms

Crinoidea.

Asteroidea.

Ophiuroidea.

Echinoidea.

Holothuroidea

Characteristics of Annelids

Annelids have a soft, moist body wall through which they breathe.

Their body is composed of rings or segments.

The digestive system is complete and developed.

Classification of Annelids

Polychaeta

Oligochaeta

Hirudinea

Archiannelida

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Edgardo Barahona
Mollusks Characteristics
-They are mostly found in marine and freshwater. Very few are terrestrial and found in moist soil.
- Their body has a cavity.
- The body is covered by a calcareous shell.
- The blood circulates through the open circulatory system.
Mollusk Classification
- Aplacophora
- Monoplacophora
- Polyplacophora
- Bivalvia
-Gastropoda
- Cephalopoda
- Scaphopoda

Annelids Characteristics
- They are coelomate and triploblastic.
- They exhibit organ system level organization.
- They respire through their body surface.
- Regeneration is a very common characteristic of the Annelids.
Annelids Classification
- Polychaeta
- Oligochaeta
- Hirudinea
- Archiannelida

Echinoderms Characteristics
-They have a star-like appearance and are spherical or elongated.
- They are exclusively marine animals.
- They exhibit organ level of organization.
- They are triploblastic and have a coelomic cavity.
- They have an open circulatory system.
Echinoderms Classification
- Crinoidea
- Asteroidea
- Ophiuroidea
- Echinoidea
- Holothuroidea .

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characteristics of mollusk echinoderms.
-they are tripoblastic organism
-they have a hemocoel while echinoderms have  a coelom.
classification of mollusks.

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Mi Xia Tan Chen - 10A
Characteristics of Mollusks

They exhibit organ system level of organization

Their body has a cavity

The muscular foot helps in locomotion

Classification of Mollusks

Gastropod

Bivalvia

Cephalopodan

Scaphopoda

Polyplacophoran

Characteristics of Echinoderms

They are exclusively marine animals

The organisms are spiny-skinned

They exhibit organ level of organization

Classification of Echinoderms

Crinoidea

Asteroidea

Ophiuroidea

Echinoidea

Holothuroidea

Characteristic of Annelids

Their body is segmented

They respire through their body surface

Nephridia are the excretory organs

Classification of Annelids

Earthworms

Sea worms

Leeches

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REMEMBER TO WRITE YOUR NAME
WRITE MAIN CHARACTERISTICS AND CLASSIFICATION OF MOLLUSK ECHINODERMS AND ANNELIDS

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Main Characteristics and Classifications of Mollusk, Echinoderms  and Annelids.

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Main Characteristics and Classifications of Mollusk, Echinoderms  and Annelids.

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Jose Aparicio
Mollusks

mollusks are the largest group of animals on Earth

Mollusks have a skin like organ that covers the visceral hump, this is called mantle

Mollusks are distinguished by a muscular foot

Classifications of Mollusks

Bivalves

gastropods

cephalopods

Echinoderms

They are the only animal with a water vascular system

They have a central disk from which flexible arms, or rays, radiate.

Thay are all animals and have spines that grow from a mechlike internal skeleton made of calcium carbonate

Classification of Echinodermata

Crinoidea

Asteroidea

Ophiuroidea

Echinoidea

Holothuroidea

Annelids

They have cylindrical bodies that are divided into many consecutives ringlike segments

Most of them have rows of external bristles attached to each segment

Inside them, each segment is separated from the next by a dividing wall septum

Classification of Annelids

Earthworms

Sea worms

Leeches