Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Deuterostomes |
Clade: Deuterostomia; make up the 3rd major branch of the animal kingdom. Include: Echinoderms- sea stars, sea urchins, sand dollars. Chordates- the phylum that includes humans and other vertebrates (animals with a vertebral column and bony cranium). |
|
|
Hemichordates |
Small group of wormlike marine animals, usually classified as deuterostomes Have a 3 part body made up of proboscis, collar, and trunk. |
|
|
Shared Derived Characters |
Synapomorphic characters; an apomorphy that distinguishes one clade from the rest. |
|
|
Water Vascular System |
A network of fluid-filled canals and chambers; derived character of echinoderms. |
|
|
Endoskeleton |
Internal skeleton, covered by a thin, ciliated epidermis. Consists of calcium carbonate (CaCO3) plates and spines; echinoderm |
|
|
Chordates |
Deuterostomes; coelomates with bilateral symmetry, a tube-within-a-tube body plan, and three well-developed germ layers. 4 characters that distinguish chordates from other animals: notochord; dorsal, tubular nerve cord; postanal tail; and endostyle. |
|
|
Notochord |
A dorsal, longitudinal rod composed of spongy connective tissue cells surrounded by a tough fibrous sheath; firm but flexible; plays important role in embryonic development of (chordate) vertebrates. |
|
|
Dorsal, tubular nerve cordpo |
A CB nerve cord in a chordate that is located dorsally rather than ventrally, is hollow rather than solid, and is single rather than double. |
|
|
Postanal Tail |
Appendage in chordates that extends posterior to the anus. |
|
|
Endostyle |
Present in some chordates; a groove in the floor of the pharynx that secretes mucus and traps food particles in the sea water passing through the pharynx. |
