( UNIT 03 ) Phylums Flashcards
1
Q
Phylum Porifera (8)
A
- First Phylum
- “Pores”
- Sessile
- Asymmetrical
- No tissues / organs
- Filter feed
- Hermaphrodites
- Sexual + Asexual
2
Q
Phylum Cnidaria (7)
A
- Second Phylum
- Named after stinging cells (Cnidocytes) which they use to capture prey
- Radial symmetry
- Digestion through single body cavity
- Floating/sessile
- Simple nervous system
- Sexual + Asexual
3
Q
Phylum Platyhelminthes (9)
A
- 3rd Phylum
- Commonly called: Flatworms
- Bilateral symmetry
- Digestive tract: 1 opening
- Acoelomate (no lined body cavity)
- Nervous: Ganglion + nerve cords
- Excretory: Uses special flame cells to rid of waste and maintain homeostasis
- Hermaphrodites
- Sexual + Asexual
4
Q
Phylum Nematoda (7)
A
- 4th Phylum
- Bilateral symmetry
- Commonly called Roundworms
- Digestive tract: 2 openings (first to have anus)
- Pseudocoelomate (partially lined body cavity)
- Nervous: Ganglion + nerve cords
- Sexual reproduction ONLY
5
Q
Phylum Mollusca (9)
A
- 5th Phylum
- Bilateral Symmetry
- First to have Coelom
- Digestive Tract: 2 openings + feed with radula
- Circulatory: Chambered heart (some open systems, some closed)
- Nervous: Brain + Sensory structures
- Special structures: Muscular foot + mantle
- Excretory: Nephridia
- Sexual
6
Q
Phylum Annelida (7)
A
- 6th Phylum
- Bilateral symmetry
- Common name: Segmented Worms
- Digestive Tract: 2 openings
- Respiratory: Gas exchange through skin
- Nervous: Small brain + nerves
- Circulatory: Closed system + 5 primitive hearts
- Excretory: Nephridia
7
Q
Phylum Arthropoda (9)
A
- 7th Phylum
- Exoskeleton + Jointed Appendages
- Bilateral Symmetry
- Segmented body regions
- Nervous: Brain made from fused pairs of ganglia and sensory structures
- Circulatory: Heart + closed vessels
- Respiratory: Gills, Trachea tubes, Book lungs
- Excretory: Malpighian Tubules (waste + homeostasis)
- Sexual
8
Q
Phylum Echinodermata (11)
A
- 8th Phylum
- Radial Symmetry
- Respiratory + Circulatory + Excretory : Water Vascular System
- Spines (varying sizes)
- Tube feet
- Ampulla
- First Deuterostomes
- First Endoskeleton
- Can extend stomach for digestion
- Nervous : Nerve ring surrounds mouth and nerves branch out
- Sexual
9
Q
Phylum Chordata
A
- Notochord that becomes vertebrae
- Post-anal tail at some point of development
- Dorsal tubular nerve cord
- Pharyngeal pouches that become either gills or tonsils/glands
- Ancestral thyroid gland
