Deuterostomes- Echinoderms and Chordates

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Lab 10
Macey Peterson
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Macey Peterson
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Pregunta Respuesta
What two phyla are contained within the grouping of deuterostomes? Phylum Echinodermata Phylum Chordata
Pentaradial symmetry
Bilateral symmetry
A: Digestive Glands B: Central Disk C: Anus D: Stomach E: Spine F: Gills G: Sieve Plate H: Radial Nerve I: Ampulla J: Podium L: Tube Feet M: Radial Canal N: Ring Canal
Locomotion Feeding Gas exchange Sensory perception
Hydraulic Pressure
1. Adults have pentaradial symmetry 2. Water vascular system with tube feet 3. Endoskeleton of calcareous ossicles
Ammonia
It does not have one (Ammonia diffuses across the body surfaces and tube feet)
Predatory carnivore; everts stomach to digest prey
Class Asteroidea
Class Ophiuroidea
Suspension feeding, Scavenging, Predation
Class Crinoidea
Suspension feeding
Class Echinoidea
Test
Aristotle's Lantern
Five
Herbivore
Deposit feeder
Class Holothuroidea
Suspension or deposit feeding
Self-evisceration
Name the four defining features of chordates. Notochord Dorsal, hollow, nerve cord Pharyngeal gill slits Post-anal tail
From which embryonic germ layer does the notochord develop from? Mesoderm
In organisms in which the notochord persists into adulthood, what are its functions? Support and locomotion
From which embryonic germ layer does the dorsal, hollow nerve cord develop? Ectoderm
What organ does the anterior portion of the neural tube develop into? Brain
What organ does the posterior portion of the neural tube develop into? Spinal cord
Subphylum Urochordata
None; most are sessile
Suspension feeding
A
B
Suspension feeding
All of them
Subphylum Cephalochordata
During feeding, water passes through the SLITS of the PHARYNX and into the ATRIUM and then out a pore.
What are the 6 defining features of members of subphylum Vertebrata? - extreme cephalization -cranium -neural crest cells -gill arches -vertebrae (in most) -kidneys, liver, pancreas
Neural crest cells
Name the skeletal support rods that form on both sides of the pharyngeal gill clefts. Gill arches
Atrium
Ventricle
Excretion Osmoregulation
Nephron
Ammonia
Urea
Uric Acid
Class Myxinoidea
Slime secreted from slime glands
Scavengers, use keratinized tooth-like structures for feeding
External parasites; latch onto host w/ oral sucker and puncture skin with rasping tongue
Class Petromyzontoidea
Suspension feeding
Of what does the axial skeleton consist? Vertebral column and cranium
Of what does the appendicular skeleton consist? Pelvic and pectoral girdles and associated paired appendages
Class Chondricthyes
Cartilage
Lateral line system
Two-chambered heart, single circulation
What is the term for organisms that bear live young that develop within a uterus and are fed via a placenta? Viviparous
What is the term for organisms that produce yolky eggs that develop within the reproductive tract of the mother until they hatch? Ovoviviparous
What is the term for organisms that lay eggs that develop and hatch outside the body? Oviparous
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