Chapter 2 phylum Chordata Flashcards
0
Q
Proto-
A
First
1
Q
-stome
A
Mouth/opening
2
Q
Protostomes
A
Worms, molluscs, arthropods
3
Q
Deuterostomes
A
Echinoderms, chordates
4
Q
General characteristics of chordates
A
- multicellular, tripliblastic, deuterostomes
- coelom
- complete gut tube = 2 openings
- bilateral symmetry
- right and left (animal’s)
- dorsal and ventral
- cranial and caudal (anterior, posterior)
5
Q
Distinguishing chordate characteristics
A
- notochord formed by DHNC
- thyroid glands/endostyle
- dorsal hollow nerve cord (DHNC)
- pharynx with slits for filtration
- post-anal tail
6
Q
Notochord
A
- supportive rod, mesoderm, vacuoles (hold food/water)
- hydrostatic skeleton, patterning
- induces DHNC
7
Q
Dorsal hollow nerve cord
A
Induced to form by notochord signals
Sonic hedgehog proteins = 1 of 3 proteins in the mamma ilia signaling pathway family called hedgehog
8
Q
Pharynx w/ slits
A
Pharynx= throat Slits= ears, hole where tonsils sit
- filter feeding (primitive/old)
- modified later as jaw, gills, aorta
9
Q
Post-anal tail
A
Used for balance
Communication (dog)
10
Q
Endostyle/thyroid
A
Regulates metabolism
