Animal Diversity III
Evolutionary Relationships
Phylum Echinodermata
Starfish Larvae
Bilateral symmetry
Deuterostomes
Phylum Echinodermata
-water vascular system
-tube feet-used in locomotion, feeding, gas exchange
-adults with radial symmetry, larva with bilateral symmetry
-Examples
Starfish
sea urchins
brittle stars
sea cucumbers
feather stars
Deuterostome Development
Click image to view
To the blastula and beyond!
http://scienceblogs.com/pharyngula/2007/02/basics_gastrulation_invertebra.php
Phylum Echinodermata
Phylum Chordata
Phylum Chordata
Phylum Chordata
lateral line system in fish
– organ that can sense
changes in pressure
neuromast
http://www.pdn.cam.ac.uk/groups/bakerlab/Hair_cell_SEM.jpg
Phylum Chordata
http://balzamator.narod.ru/specimens/fish.jpg
Picture by Eva Falch, SINTEF Fisheries and
Aquaculture
Phylum Chordata
Birds
-Carinates-have a keel on
sternum for flight muscle
attachment
-Ratites-no keel on sternum
Phylum Chordata
Birds
http://www.geauga4h.org/poultry/chicken_digestion.htm
Lab Exercises
Exercise 1 – Sea Urchin Embryology
Exercise 2 – Sea Star external structure
Exercise 3 – Perch skeleton - demo
Exercise 4 – Fish – external structure
Exercise 5 – Fish – internal features (dissection)
Exercise 6 – Pigeon – skeleton demo
Exercise 7 – Quail – external structure
Exercise 8 – Quail – internal features (dissection)
Dissections
• The cold saltwater tank in lab contains examples from
some of the groups studied in lab
• DO NOT START CUTTING UP SAMPLES WILLY NILLY !!!
• Clam and squid dissections - instruments, pans, gloves,
and disposal container for dissection remains are on
the side bench at the back of the room.
• Please try to keep this area reasonably organized
• Wash/rinse the instruments and pans after use
• Make sure You dispose of dissection remains in the
labeled container - NOT in the trash!
Cool Links
Sea Urchin Fertilization
http://www.youtube.com/watch?v=3t8tg9iX9Cc
Videos-sea cucumber defense-expels intestine
http://www.cynical-c.com/?p=17162
Starfish Attack
http://www.youtube.com/watch?v=2eLhud7DURQ&feature=related
Starfish Eating
http://www.youtube.com/watch?v=A100m5EpfFI&feature=related
Next Week
Conner Museum Lab