Transcript echinoderm
Echinoderms Review Starfish belong in the Animalia KINGDOM _______________ Echinodermata PHYLUM _______________ CLASS ___________________ Asteroidea invertebrates Echinoderms are _________________ vertebrates invertebrates radial Adult echinoderms have ______________ symmetry. no bilateral radial Deuterostomes _____________ are organisms whose anus develops from the blastopore area in the embryo. Cardiac The ______________ stomach in a starfish is extruded out through the mouth to eat. Since a starfish has NO INTESTINE, the nutrients are absorbed by the digestive glands/ _______________ pyloric cecae Portion of the stomach that is connected to the anus and digestive glandsPyloric stomach Echinoderms have an endoskeleton made of calcium carbonate plates ossicles called _______________. In Latin the name “echinoderm” means __________________ Spiny skin Name one of the 3 characteristics your book lists that are found only in echinoderms. Endoskeleton made of OSSICLES Water vascular system Tube feet Sea stars (starfish) belong to the Class _________________ Asteroidea The mouth of a starfish is located on the _____________ surface. oral All of these organisms belong to Echinodermata the phylum _______________ (Echinoderms) The small tiny pinchers at the base of the spines on the surface of a starfish pedicillariae are called _______________ Water enters the water vascular system through small pores in the madreporite __________________. open Starfish have _____________circulation. The small movable suction cupped extensions of the water vascular system which aid in locomotion and feeding are called _____________. tube feet What is the function of the ampullae? Squeeze to control water entering and leaving the tube feet The seastar can turn its ___________ cardiac stomach inside out through its mouth when it eats. Compare Digestive and Nitrogen waste DIGESTIVE WASTE NITROGEN WASTE Made where? In digestive tract By body cells Comes from? Left over from undigested food Removed by what body system? Leaves body as? Digestive Feces breakdown of proteins during metabolism Excretory ammonia, urea, OR uric acid The stone canal, ring canal, and radial canal are all parts of the water vascular system. ________________ Nutrients from foodare absorbed in the digestive glands ________________in a starfish. Tell a function of the tube feet. Locomotion Hold onto & pry open clam shells Gas exchange/remove nitrogen waste The skin gills (dermal branchiae on the surface connect into the coelom ___________inside. The network of water filled canals connected to the tube feet is called the _________________ Water vascular system. carnivores Most starfish are _______________. Carnivores herbivores omnivores This organ absorbs nutrients in an earthworm and a clam but is missing in starfish intestine Echinoderms are thought to be more closely related to higher organisms like vertebrates because _______________ their blastopore becomes the anus just like in higher organisms The bulb-like sac at the upper end of each tube foot is called the _____________ ampulla The spines on the surface connect into the ____________ inside. Ossicles of the endoskeleton Type of reproduction seen in starfish Asexual Sexual They can do both! Symmetry seen in echinoderm larvae bilateral T or F Most echinoderms are hermaphrodites. False, they have separate sexes. Fertilization in echinoderms is _______________ external External internal Seastars “breathe” by exchanging gases through their _____________________________. skin gills (dermal branchiae) and skin on their tube feet Name one of the parts of the nervous system in a starfish. Nerve ring or radial nerve The ability of starfish to regrow lost arms is called regeneration ________________. Type of symmetry seen in echinoderm larva bilateral General term for reproductive organs gonads The tube that connects the madreporite to the ring canal is stone canal the ____________________ The surface of a starfish opposite aboral from the mouth is the _____________ Surface. The digestive glands connect to the pyloric __________________ stomach. cardiac The ___________________ stomach is extruded out of the mouth during feeding What is the function of the pedicillariae? Keep surface of starfish free of algae and small organisms that might damage or block it eyespots Starfish have _____________ at the ends of each arm that can sense light and dark The anus and madreporite are on the ____________ surface of a starfish. aboral deuterostomes Echinoderms are _______________ Protostomes Deuterostomes Starfish absorb oxygen through their dermal branchiae and the surface of _______________ their _________________ Tube feet Name a part of the nervous system in a starfish Nerve ring, radial nerves, nerve net, eyespots Organisms in which the blastopore becomes the anus are called deuterostomes __________________ Special kind of radial symmetry seen in 5 or multiples Of 5 pentaradial Body part used in respiration in a starfish Dermal branchiae Which of the following is true about the circulatory system in a starfish? Aortic arches surround the digestive system & pump blood A heart surrounded by a pericardial cavity pumps hemolymph No heart or blood vessels. Fluid in the coelom bathes and distributes nutrients & oxygen No heart or blood vessels. Fluid circulates in the coelom Name a part of the digestive system in a starfish Mouth, pyloric stomach, cardiac stomach, digestive glands, anus All echinoderms are MARINE. live in oceans That means they ____________. have military-like camouflage live in the ocean march in lines like soldiers stay in one place Tell the body system each part belongs to: vascular Madreporite Water _____________________ nervous Nerve ring _____________________ Water vascular Ring canal ______________________ Ossicles ______________________ Skeletal Reproductive Gonads ______________________ Respiratory/excretory Skin gills ______________________ Digestive Cardiac stomach ___________________ Main body part used in respiration in a starfishSkin gills/ dermal branchiae Spines on the surface connect to the ________________ underneath. ossicles Trace the path that water follows in the water vascular system: Madreporite Stone canal _____________________ Ring canal _____________________ Radial canal (or abulacral _____________________ tube feet canal) The digestive glands connect to the pyloric __________________ stomach. Type of symmetry seen in this echinoderm radial Name 6 characteristics of Echinoderms Invertebrates Deuterostomes Spiny skin Water vascular system with tube feet Endoskeleton made of ossicles Radial symmetry Bipinnaria larva marine Tube feet are found along the __________________ groove. ambulacral When you cut into the starfish, the space you see around the internal coelom organs is the ______________ Mantle cavity pseudocoelom coelom pericardial cavity The ventral surface is also called the oral surface. _______ TRUE or FALSE Starfish are hermaphrodites False. They have separate sexes This diagram represents the 3 structures you learned about on the surface of a starfish. spines The blue structures are _____________ protection for _____________________. The red structures are ____________ dermal branchiae for Exchanging ____________________ gases/removing nitrogen waste The green structure is a _____________ pedicellaria for _________________________ keeping the surface free of organisms Tell the function of each part: Opening for water vascular system _____________________ madreporite Absorb nutrients _____________________ Digestive glands Connect madreporite Stone canal to ring canal ______________________ Plates that fuse to form ossicles skeleton ______________________ Make sperm or eggs _________________ gonads Exchange gases and get rid of nitrogen waste _________________ dermal branchiae Tell the function of each part: Keep skin free of organisms _____________________ pedicellariae Extruded out through stomach mouth during feeding Cardiac ________________ Stomach that connects to digestive glands ______________________ Pyloric stomach Squeeze to move water up and down in tube feet _________________ ampullae spines Spikes on surface for protection _____________ A B E C D MADREPORITE A = _________________ STONE CANAL B = _________________ RING CANAL C = _________________ RADIAL CANAL D = _________________ F AMPULLAE E = ___________________ TUBE FEET F = ___________________ The only class that includes the feather Crinoidia stars is _________________________ In which class would you see the structure Aristotle’s lantern? Echinoidea All echinoderms are MARINE. This means they Live _______________ in salt water (oceans) How is reproduction in a starfish different from that of an earthworm? Earthworms= hermaphrodites Starfish= separate sexes; can use regeneration for asexual reproduction ________________ have respiratory trees Sea Cucumbers for diffusion of gases. Holothoroidea These are in the class _______________. Crinoidea The classes Ophiuroidea ___________ and ___________ do not use their tube feet for movement. Tell one way the starfish are similar to earthworms. Both have: true coelomates invertebrates sexual reproduction external fertilization Why are echinoderms thought to have evolved from a bilaterally symmetrical ancestor? They have a bilaterally symmetrical larva The Crinoids called Sea lillies __________________ are sessile Which class has snake-like rays? What is in this class? Ophiuroidea, brittle stars and basket stars The Crinoids called Feather stars __________________ can move using their __________ Arms/rays