Phylums Flashcards
1
Q
Porifera (sponges)
A
No tissue organization
Mobile when larva and sessile (don’t move) as adults.
Coenocytes–Colar Cells: Respiration, Digestion, and Reproduction (filter)
Asymmetrical
Sexual Reproduction (no male and female-sperm and ovum come from same original cell. And Sexual Reproduction–Budding; Piece of one breaks off and grows in suitable environment
Spicule–Calcium carbonate and cilia surround outside
2
Q
Cnidarians
A
Dipoblastic
-Has mouth but no anus [gastro vascular system; eats food and spits back up]
Radial Symmetry
Sexual and Asexual reproduction
Polyp and Medusa form within life cycle
Gas Exchange–Diffusion [no lungs for respiratory system]
Cnipocyes–stinging cells
3
Q
Platyhelminthes
A
Triploblastic Bilateral Symmetry Cephalization (some) Acoelomate Complex Life Cycle Asexual reproduction--fission
4
Q
Nematoda
A
Triploblastic Bilateral symmetry Cephalization Pseudocoelomate Complete gut--digestive tract; straight shot No circulatory system Some parasitic and some free-living Primitive brain Respiration--Diffusion Cuticle--Protectant Sexual Reproduction Only longitude muscles
5
Q
Mollusca
A
Triploblastic Bilateral Symmetry Coelomate--Modification in digestive tract Sexual reproduction; Separate sexes Open circulatory system Respiration through gill Mantle--surrounding layer Distinct foot for movement Prostomate Development
6
Q
Annelida
A
Triploblastic Bilateral symmetry Coelomate Closed circulatory system Segmented--Body segments for more precise and complex movements; allows for specialization of body parts--Can isolate injuries to avoid death to entire body. Gas Exchange--Skin or gills Cephalic Complete Gut Protostomate Development
7
Q
Arthropoda
A
Triploblastic Bilateral Symmetry Cephalic Complete gut Coelomate Advanced segmentation and specialization Gas exchange--across surface of tracheal system Open circulatory system; moves nutrients Exoskeleton with chitin Sexual Reproduction--separate sexes Tagomization--specialization of body part for particular function. **Parajointed Appendages: Legs** Dorsal brain with ventral nerve chord
8
Q
Echinodermata
A
Triploblastic Penteradial Symmetry--Radial in middle with 5 arms coming off Endoskeleton with spines (ambucral system) Complete Gut Deuterostomate No respiratory system Sexual reproduction; slitting itself Gas Exchange--water vascular system Mobility--with tube feet Two stomachs
9
Q
Chordata
A
Triploblastic Endoskeleton Deuterostomate NEEDED CHARACTERISTICS 1. Dorsal tubular nerve chord 2. Notochord 3. Pharyngeal gill slits 4. Post-anal-tail [tail behind anus]
