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26 Cards in this Set

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Mandibles
Jaw like appendages
crush food
Maxillae
Food Handling
Move water across gills
Antennae
Touch, taste
Statocysts @base
Cephalothorax
1+ thorax segments fused to the head
covered in single carapace plate
Abdomen
one pair of appendages per segment in Malacostraca & Remipedia
Body Plan
Schizocoelous
Space filled in leaving room for blood sinuses or hemocoels
Muscular System
Antagonistic pairs
Flexors(draw in) and Extensors(pull away)
Respiratory System
Small Crustaceans:through this layers of exoskeleton(at limbs)
large crustaceans:gills on thoracic legs in "gill cavity" water flow directed by bailers(2nd maxilla)
Class Remipedia
"oar footed"
only crustaceans besides crayfish with appendages beyond cephalothorax
Class Cephalocarida
"Head Shrimp"
No carapace
No eyes
primative(all the same appendages) and hermaphroditic
Class Branchiopoda
"Lung Feet"
flat legs for respiration
1.Anostraca
2. Notostraca
3. Diplostraca
Anostraca
No carapace
Fairy or brine shrimp
Notostraca
single carapace
tadpole shrimp
Diplostraca
double carapace
Daphnia or water fleas
Class Ostracoda
Like Daphnia but with bivalve carapace (body totally enclosed)
important link in food web
Class Maxillopoda
Copepoda
primary consumer in many aquatic foodwebs
Class Maxillopoda
Cirripedia
"curl footed"
Barnacles
no abdomen
head thru shell for filter feeding
Class Malacostraca
Isopoda
"pill bugs"
only terrestrial crustaceans
breath w/ gills
Class Malacostraca
Euphausiacea
Krill
bioluminescent
important food web component
Class Malacostraca
Decapoda
5 pairs walking legs
true shrimp, crabs, and lobsters
only other group with abdominal appendages (for swimming)
Circulatory System
Open
ventral vessel>gills>hemocoel>heart>Dorsal Vessel>rest of body
Excretory System
Paired green glands in blood sinus in head
filter wastes and dump them through openings in the exoskeleton (fouling)
Nervous System and sense organs (3)
Dorsal brain wraps around esophagus with double ventral nerve cord
1 tactile hairs(sensilla) on chelipeds, mouth parts, and telson
2.statocysts at base of antennae, tiny grains reflect body position
3. Eyes compound w/ ommatidia
Metamorphosis
naupilus molts and adds appendages and segments
Molting and Ecdysis
Molting-process of making a new cuticle (secrete protein and chitin)
Ecdysis-shedding of the exoskeleton
The fraction of administered dose of a drug that reaches systemic circulation
Bioavailability (F) = f * (1-ER)
f = absorption
ER = extraction ratio = CL/Q