Lab Practical Vocab Flashcards
Deuterostomes
Coelomate, bilateral symmetry, radial cleavage- blastopore becomes anus
Protostomes
Coelomate, spiral cleavage-blastopore become mouth
Morula
Solid ball of cells
Blastomeres
Equally sized cells arising from cleavage
Invaginate
Invert in gastrulation
Phylum Porifera
Sponges, no germ layers
Pinacocytes
Flattened cells on outside of sponge
Choanocytes
Flagellated cells that aid in filter feeding
Mesohyl
Middle layer containing ameboid cells
Spongocoel
Inside chamber
Osculum
Excurrent opening
Ostia
Incurrent opening
List sponges in order of least to most complex
Asconoid, syconoid, leuconoid
3 classes of Porifera
Calcarea- calcerous spicules (only group with asconoid)
Hexactinellida- glass like spicules
Demospongiae- spongin fibers or siliceous spicules, 80% of all sponges
Phylum Cnidaria
Diploblastic, radial symmetry.
Includes: hydras, jellyfish, etc.
Oral vs aboral
Oral side has mouth
Aboral side is opposite
Polyp stage
Sessile, sexual or asexual, has gastrozooids and gonozooids
Cnidae
Specialized organelles
Ex:// nematocysts—stingers
3 major classes of Cnidaria
Hydrozoa- polyp and medusa stage alternate
Scyphozoa- medusa stage is dominant (jellyfish)
Anthozoa- only polyp stage (coral and anemone)