Invertebrates 1 Flashcards Preview

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Flashcards in Invertebrates 1 Deck (13):
1

Phylum Porifera-Sponges

-Only type of animal to have cellular organization
-Saclike bodies perforated by many pores
-beating of flagella (choanocytes) produces water currents that flow through pores into central cavity and out the osculum
-sessile filter feeders
-Asexual reproduction by fragmentation or budding

2

Asconoid

small, tube-shaped flagellated spongocel

3

Syconoid

Tubular body, Flagellated canals

4

Leuconoid

Most complex, largest. Large colonial masses. Flagellated Chambers

5

Marine Natural Products

-Concerns disciplines of Orgo, biochem, pharmacology, bio, and ecology
-12,000+ compounds isolated from marine sources
-secondary metabolites

6

Phylum Cnidaria

Tubular animals that most often reside in shallow marine waters

polyp and medusa
stinging cells:cnidocytes
-fluid filled capsule, nematocyst
-Two layered body sac
-Outer layer:protective epidermis
-inner layer:gastrovascular
nerve net

7

Cnidaria symmetry

radial

8

Class Scyphozoa

Medusa, thick mesogela
Float in open sea
manubrium w/oral lobes
stomach w/ pouches
Sense organs = rhopalium (statocyst+ocelli)
separate sexes

9

class Cubozoa

sea wasp:venemous

10

Class Hydrozoa

-Marine and freshwater
-a colony of polyps enclosed by a hard, chitinous covering
-feeding polyps
-extend far beyond covering
-have nematocysts on tentacles
-can have sexual repro

11

Class Anthozoa

-Polyp, no medusa
-sea anemonies, hard corals, sea fans
-large gastrovascular cavity w/ septa
-Ciliated groove: siphonoglyph
-Circular and Longitudinal muscles
-Attachment by pedal disc
-Pedal lasceration
-Potent nematocysts/Acontia
-Coral reefs -Hermatypic corals
-Calcareous cups secreted by polyps (Zooanthellae)

12

Coral requirements

warm, clear tropical waters and light salinity of normal seawater

13

Phylum Ctenophora
comb jellies

-8 comb rows called ctehes; covered by long cilia
-2 long tentacles, colloblasts
-fragile, transparent body
-no nematocysts
-apical sense organ
-voracious appetite
-Bioluminescence