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Echinoderm Characteristics Copyright © McGraw-Hill Education Echinoderms are Deuterostomes Echinoderms are deuterostomes – a major transition in the phylogeny of animals. The approximately 6000 living species of echinoderms are marine animals.
Echinoderm Characteristics Copyright © McGraw-Hill Education Body Structure Characterized by spiny endoskeleton The endoskeleton consists of calcium carbonate plates covered by a thin layer of skin. The skin contains pedicellariae, small pincers that aid in catching food and in removing foreign materials from the skin. Echinoderms have radial symmetry as adults. Larvae have bilateral symmetry.
Echinoderm Characteristics Copyright © McGraw-Hill Education Body Structure Water-vascular system The water-vascular system is a system of fluid-filled, closed tubes that work together to enable echinoderms to move and get food. The opening to the water-vascular system is called the madreporite, which draws water into the body. Water moves through a series of canals to the tube feet – tubes with suction-cuplike structures at the end, which echinoderms use for movement, food collection, and respiration. At the opposite end of the tube foot is a muscular sac called the ampulla, which expands and contracts to extend the tube foot.
Echinoderm Characteristics Copyright © McGraw-Hill Education Body Structure Feeding and digestion Echinoderms have a variety of feeding strategies beyond tube feet. Sea lilies and feather stars extend their arms to trap food. Sea stars can push their stomachs out of their mouths and coating their prey in digestive enzymes. Brittle stars trap organic matter in mucus on their arms. Sea urchins use teethlike plates to scrape algae off rocks.
Echinoderm Characteristics Copyright © McGraw-Hill Education Body Structure Respiration, circulation, and excretion Echinoderms use tube feet for respiration. Oxygen diffuses from the water through the thin membranes of the tube feet. Circulation takes place in the body coelom and the water-vascular system. Excretion occurs by diffusion through thin body membranes.
Echinoderm Characteristics Copyright © McGraw-Hill Education Body Structure Response to stimuli Have both sensory and motor neurons Sensory neurons respond to touch, chemicals dissolved in the water, water currents, and light. Many echinoderms can also sense the direction of gravity.
Echinoderm Characteristics Copyright © McGraw-Hill Education Body Structure Movement The structure of the endoskeleton is important for determining the type of movement an echinoderm can undertake. Swimming Crawling Burrowing
Echinoderm Characteristics Copyright © McGraw-Hill Education Body Structure Reproduction and development Most echinoderms reproduce sexually. Echinoderms can regenerate lost body parts.
Echinoderm Characteristics Copyright © McGraw-Hill Education Echinoderm Diversity Reproduction and development Living classes of echinoderms include: Asteroidea, the sea stars Ophiuroidea, the brittle stars Echinoidea, the sea urchins Crinoidea, the sea lilies and feather stars Holothuroidea, the sea cucumbers Concentricycloidea, the sea daisies
Echinoderm Characteristics Copyright © McGraw-Hill Education Echinoderm Diversity Sea stars Five arms arranged around a central disk Found in shallow coastal waters and tide pools Important marine predator
Echinoderm Characteristics Copyright © McGraw-Hill Education Echinoderm Diversity Brittle stars Arms are thin and very flexible, without suckers on tube feet. Move by rowing themselves quickly over the bottom rocks and sediments Feed on small particles suspended in the water
Echinoderm Characteristics Copyright © McGraw-Hill Education Echinoderm Diversity Sea urchins and sand dollars Sea urchins burrow into rocky areas. Can be herbivorous grazers or predators. Sand dollars can be found in shallow water burrowing into the sand. Filter organic particles.
Echinoderm Characteristics Copyright © McGraw-Hill Education Echinoderm Diversity Sea lilies and feather stars Sessile for part of their lives. Can detach themselves and move elsewhere Capture food by extending their tube feet and arms into the water where they catch suspended organic materials
Echinoderm Characteristics Copyright © McGraw-Hill Education Echinoderm Diversity Sea cucumbers Some tube feet are modified to form tentacles to trap suspended food particles. Only echinoderm to have respiratory organs in the form of respiratory trees, which also function in excretion When threatened, it can cast out some of its internal organs through its anus.
Echinoderm Characteristics Copyright © McGraw-Hill Education Echinoderm Diversity Sea daisies Less than 1 cm in diameter Disc-shaped with no arms Tube feet are located around the edge of the disc
Echinoderm Characteristics Copyright © McGraw-Hill Education Ecology of Echinoderms Echinoderm benefits Sea cucumbers and sea urchins are sources of food. Important in ecosystem balances, especially in controlling algal growth. Bioturbators – stir up sediments on the ocean floor, suspending nutrients into the water column
Echinoderm Characteristics Copyright © McGraw-Hill Education Ecology of Echinoderms Echinoderm harm When populations grow overly large, sea stars or sea urchins can disrupt ecosystems Can destroy habitats such as coral reefs and kelp forests
Click on a lesson name to select. Section 1: Echinoderm Characteristics Section 2: Invertebrate Chordates Chapter 27 Echinoderms and Invertebrate Chordates.
Phylum Echinodermata Kingdom Animalia. General Characteristics Name means “ spiny skin ” 1.Exclusively marine 2.Possess a semi-flexible endoskeleton.
Echinoderms copyright cmassengale. https://app.discoveryeducation.com/learn/vi deos/4880E0EA-1EA5-42A4-83DA- 299F3921DCDD?hasLocalHost=falsehttps://app.discoveryeducation.com/learn/vi.
Spiny Skin. Summary of phyla characteristics Where do they live: Marine What kind of symmetry do they have: Adult – radial Larval – bilateral List 5 classes.
Echinoderms are __________, ________, __________, ________, ____________, _____________ and ____________. * Echinoderm means _______________. All echinoderms.
Diversity Echinodermata means “spiny skin” Echinoderms usually inhabit shallow coastal waters and ocean trenches organisms in this class include:
Echinoderms copyright cmassengale. Diversity Echinodermata means “spiny skin” Echinoderms usually inhabit shallow coastal waters and ocean trenches.
Chapter 38 Echinoderms and invertebrate chordates 1 Echinoderms and Invertebrate Chordates Chapter 38 P
Phylum Echinodermata. Echinoderms Sea StarsSea Stars Sea UrchinsSea Urchins Sand DollarsSand Dollars Sea CucumbersSea Cucumbers.
1 Phylum Echinodermata Echinoderms are an ancient group of marine animals, with about 6000 living species -Characterized by deuterostome development and.
Phylum Echinodermata. What is an echinoderm? PHYLUM ECHINODERMATA Members of this phylum have many unusual characteristics. They move by means of hundreds.
Echinoderms. Diversity Echinodermata means “spiny skin” Echinoderms usually inhabit shallow coastal waters and ocean trenches organisms in this.
Echinoderms. What are echinoderms? spiny skin internal skeleton water vascular system tube feet.
Phylum Echinodermata. Some Representatives of Echinodermata copyright cmassengale.
Echinoderms Ch Phylum ECHINODERMATA Spiny Skin First Phlya with an INTERNAL skeleton ENDOSKELETON: formed from hardened plates of Calcium.
Echinoderms “Life with Spiny Skin”. Worms, mollusks, and arthropods all have bilateral symmetry. Worms, mollusks, and arthropods all have bilateral symmetry.
Echinoderms. Diversity Echinodermata means “spiny skin” Echinoderms usually inhabit shallow coastal waters and ocean trenches organisms in this class.
Echinoderms Section Echinoderms Examples: sea stars, sand dollars, sea urchins, & sea cucumbers Marine environments Brilliantly colored
Echinoderm review. On the following slides with pictures, try to: name the organism Give the Class for the organism State the number of species in the.
Unit 4. Meaning o Echino= spiny o Dermis= skin The skin of these animals is stretched over an endoskeleton, or internal skeleton formed of hardened.
Phylum Echinoderm. Echinoderm Mostly sessil life Adult has no head or brain Central nervous system with nerves radiating into arms All marine Echinodermata.
Vocabulary 0ssicle = protective spines on a sea star Ampulla = a bulb-like sac at the base of a tube foot that functions in movement Bipinnaria =free.
Chapter 13.4 Echinoderms. Echinoderm Characteristics Echinoderms are found in oceans all over the world. They have a hard endoskeleton with thin, bumpy,
Chapter 7 Phylum Echinodermata. Characteristics: Characteristics: –Name means “spiny skin" –Endoskeleton –Water vascular system with tube feet important.
End Show Slide 1 of 37 Copyright Pearson Prentice Hall 28–4 Echinoderms.
Chapter 14, Echinoderms. Characteristics of Phylum Echinodermata One of the strangest and most unusual of all the phylums in the animal kingdom Echinoderms.
Phylum Echinodermata. The Basics Symmetry ▫ All echinoderms have pentaradial symmetry ▫ BUT… they develop from bilateral larvae Body Openings ▫ Two,
Echinoderm Classes Asteroidea – Sea Stars : Multiple arms radiating from central disk Tube feet on bottom Ophiuroidea – Brittle Stars: Distinct central.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. CHAPTER 14 Echinoderms 22-1.
Phylum Echinodermata Introduction. There are ______ characteristics of echinoderms. All echinoderms have: Spiny skin An internal skeleton A five part.
“Spiny skin”. Introduction to Phylum Echinodermata Phylum Echinodermata is a group of invertebrates that includes sea stars, sea urchins, sea cucumbers,
Sea Star Time Lapse. Sea Stars Brittle Stars Sea Urchins Sea Cucumbers Sand Dollars.
“Spiny Skin” ~7,000 species Sea stars, sand dollars, and sea urchins Clip A thin skin covers a hard calcareous platelike exoskeleton.
KINGDOM ANIMALIA Phylum Echinodermata. Members of the Phylum Echinodermata Date back 570 million years ago 13,000 fossil species Only 7,000 species today.
23.6 Echinoderms KEY CONCEPT Echinoderms are on the same evolutionary branch as vertebrates.
End Show Slide 1 of 37 Copyright Pearson Prentice Hall Biology.
Phylum Echinodermata – “spiny skin” sea stars, sea urchins, sea cucumbers a return to radial symmetry; larvae are bilateral most have arms and/or body.
Echinoderms copyright cmassengale. Echinoderms (Sea Stars, Brittle Stars, Sea Urchins, Sand Dollars, Sea Cucumbers, Sea Lillies and Feather Stars)
Echinodermata Spiny Skinned. Echinoderms *6000 living species 20,000 extinct species *all oceans, all depths *Planktonic larvae - bilateral symmetry *adult.
Echinodermata Olivia Johnson, Andrei Anashkin, Heather Schlesier
Echinoderms. Spiny skin Spiny skin Radial symmetry Radial symmetry Water vascular system Water vascular system.
Phylum Echinodermata The Spiny Skin Animals Examples: Sea Stars Brittle Stars Sea Urchins Sea Cucumbers Sea Lilies Feather Stars.
Echinoderms IN: 137. I. General Characteristics 1.Phylum Echinodermata- “spiny skinned” 2.Have bumpy exoskeletons covered with spiny skin (made from calcium.
Phylum: Echinodermata Echinos = Spiny Derma = Skin Ata= to bear “bears spiny skin” Zoology Chapter 16.
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