Ch_33_Invertebrates_Part_1 Flashcards
(158 cards)
Phylum Porifera common term
The Sponges
number of marine species in Porifera
7000
Porifera have _ adults and _ larvae
Sessile and Swimming
Sponge 3 layers
Outer Epidermis, Mesohyl, Spongocoel
How does water enter and exit Sponge Outer Epidermis
enters incurrent Ostia and exits through Osculum
what is the Mesohyl
middle layer that consists of gelatinous matrix
What does the Mesohyl gelatinous layer have?
spongin, spicules, and amoebocytes
Inner layer of Sponge
Spongocoel
Spongocoel is lined with _ to _ water
choanocytes, circulate
Sponge cell types
collar cells, amoebocytes
What are Sponge collar cells and what do they do?
flagellated choanocytes, circulate water
What do Sponge Amoebocytes do?
move with pseudopods, clean pores, secrete spongin and spicules
Sponge body forms
Asconoid, Syconoid, Leuconoid
3 type of sponges
glass, chalk, commercial
glass sponge
spicules and spongin made of silica, provide support
chalk sponge
spicules and spongin made of calcium carbonate
commercial sponges
spongin only, no spicules
sponge spicules types
calcareous, Hexactinellida, Domespongiae, spongin
3 types of Phylum Cnidaria animals
jellyfish, corals, hydrozoans
Cnidaria defining characteristic
nematocytes (cnidocytes), sting prey
Cnidaria 2 tissue layers and seperating part
outer epithelium, inner epithelium, mesoglea
2 types of Cnidaria bodies
Medusa and Polyp
Cnidaria body structure parts
tentacles, nerve net, 2 tissue layers, stinging cells (nematocytes), mesoglea
nematocysts definiton
specialized organelles in nematocytes (cnidocytes) to sting prey