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;
9 Cards in this Set
- Front
- Back
|
COELOM |
Fluid-filled internal body cavity |
|
|
Deuterostomes include |
echinoderms, hemichordates, and chordates |
|
|
Gastrulation |
Indentation formation in early embryonic stage that later forms into gut. |
|
|
Three Basic tissue layers of embryo |
Ectoderm, mesoderm, endoderm |
|
|
Deuterostomes refers to |
"second-mouth" in which mouth forms opposite from blastopore. |
|
|
Cephalochordates and Urochordates |
Chordates that lack bony or cartilaginous skeletons, filter feeders |
|
|
Five fundamental features of Chordates |
1. notochord 2. pharyngeal slits 3. endostyle or thyroid gland 4. dorsal hollow nerve chord forming central nervous system 5. postanal tail |
|
|
Notochord |
A long axial rod composed of connective tissue all around fluid-filled space. More derived vertebrates will replace it with vertebral column. |
|
|
Pharyngeal Slits |
Possible feeding accessory in basal chordates, can form gill slits. Disappear in many chordates before birth. |
