Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Echinoderms - Parma City School District
Document related concepts
Transcript
Echinoderms Phylum Echinodermata Phylum Echinodermata • Means “Spiny Skin” • Members have pentaradial (5 spokes) symmetry • They have a water vascular system Class Crinoidea • “Lily-like” • Sea lilies • Feather stars Class Ophiuridea • “Snake Like” • Basket Stars • Brittle Stars Class Echinoidea • “Spine Like” • Sea Urchins • Sand Dollars Class Holothuroidea • Sea Cucumbers Class Asteroidea • Starfish Classification • • • • • Common Name: Starfish, “Sea Star” Scientific Name: Asteroidea Phylum: Echinodermata Class: Asteroidea Other: “Spiny Skin” Major Characteristics • Body Plan: 2 sided, oral vs aboral surface • Body Cavity: Coelom • Symmetry: 5-fold Radial Symmetry (Pentaradial) • Cell Specialization: Organs, Internal Skeleton; endoskeleton made of calcium carbonate plates called Ossicles Life Support Processes • Absorption: Mouth, stomach • Feeding: Mouth - Carnivorous; Cardiac Stomach flipped inside out externally over prey • Digestion: Pyloric Stomach has digestive glands, enzymes • Respiration: Tube Feet = thin walled tissue for gas exchange Life Support Processes • Circulation: Digestive enzymes and body fluids circulate through the coelom • Excretion: Anus, Mouth, Tube Feet • Secretion: Digestive Glands, Pyloric Stomach • Response: Nerve Ring = primitive nervous system, Spines • Movement: Water Vascular System, tube feet; Ampulla Water Vascular Water Vascular SystemSystem Life Support Processes • Reproduction: Male; Female = release gametes into the water = External Fertilization, bipinnaria free swimming larvae; Regeneration of arms from central disk • Support: Endoskeleton, Water Vascular System Ecological Relationships • • • • Marine Shallow water, Tide Pools Feed On Clams Regenerative Abilities - grow new arms as long as part of central disk is still attached Body Systems Compared With Humans • Endoskeleton - but projects to the outside of the body Advancements Over Previous Phylum • Water Vascular System • Digestion - strong enzymes • The “Crown of Thorns” starfish is the world’s most destructive. It can destroy 4565 sq. in of coral in a single day • The largest species of starfish measures over 60 in. from tip to tip with a central disk of only 1.02 in.!
