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21 Cards in this Set

  • Front
  • Back
3 Phyla of Deuterostomes
-Echinodermata (sea stars + sea urchins)
-Hemichordata (acorn worms: deposit/suspension feeders)
-Chordata (vertebrates)
Animals that have a skull
Water Vascular system
A system of fluid filled tubes and chambers in echinoderms. Functions as a hydrostatic skeleton.
Tube Feet
Small mobile, fluid-filled extensions of the water vascular system of echinoderms. Used in locomotion.
The part of the tube foot of an echinoderm that extends outside of the body and makes contact with the substrate
Pharyngeal gill slits
A set of parallel openings from the throat through the neck to the outside. One of the diagnostic traits of chordates.
A long, gelatinous, supportive rod down the back of a chordate embryo, below the developing spinal chord. Replaced by vertebrae in adult vertebrates. A defining feature of chordates.
Dorsal Hollow Nerve Chord
A bundle of nerves extending fromt he brain along the dorsal side of a chordate animal, with cerebrosipinal fluid inside a hollow central channel. One of the defining features of chordates.
3 Major Lineages of Chordates
-Urochordates: small suspension feeders that live atached to hard substrates in the ocean as adults
-Cephalochordates: small mobile suspension feeders
-Vertebrates: sharks, bony fish, reptiles, mammals
A block of mesoderm on both sides of the developing spinal cord in a vertebrate embryo. Gives rise to muscle tissue, vertebrae, ribs, limbs...
Lineage of vertebrates that includes all tetrapods other than amphibians
Amniotic egg
Egg that has a watertight shell or case enclosing a membrane-bound food supply, water supply, waste repository. Gave vertebrates ability to reproduce away from H20
Gill Arches
Curved regions of tissue between the gills. Hypothesized that mutations in these led to formation of jaw
Pharyngeal Jaw
Modified gill arches that function as a second set of jaws, located in the back of the mouth. Make food processing particularly efficient.
A solution of wate and protein (particularly albumins), found in amniotic eggs, that nourish the growing embryo. (Egg white)
Protective inner membrane in which embryo of amniotic egg is enveloped
Yolk Sac
membranous pouch that contains nutrients for growing embryo
membranous pouch that holds waste material in amniotic egg
middle membrane that separates amnion, yolk sac, allantois from albumen + provides surface where gas exchange can take place between embryo and surrounding air
Amniotic Egg Picture
see pic
organ rich in blood vessels that facilitates flow of oxygen and nutrients form mother to developing offspring.