What are the three respiratory or gas exchange structures in arthropods? Name which subphylum goes with each.
- Tracheal system - uniramia (insects, centipedes+milipedes)
- Book lungs - Spiders (Chelicerata)
- Gills - Crustacea
What is a tracheal system? What animal has this system?
- Extensive network of thin-walled tubes that branch into every part of the body.
All arthropods have ____ circulatory systems. That means they have no ____ or _____ of _____ .
- open veins
What is ecdysis? How does it happen?
Molting. Enzymes dissolve old cuticle. Animal swallows water-- increased blood value. Cuticle splits and animal pulls itself out of its exoskeleton. Hides until new shell hardens.
Complete metamorphosis? Example?
- egg -> larva -> pupa -> adult
- ex: egg -> caterpillar ->chrysalis -> butterfly
Incomplete metamorphosis? Examples?
- egg -> nymph -> adult
- ex: mites, grasshoppers, cockroaches
Direct development? examples?
- egg -> juvenile -> adult
- ex: crayfish. young look like adult.
Arthropods have ______ exoskeletons.
Arthropoda are segmented but they do not have ________
Arthropods have reduced competition through _________
One difference of Arthropods from annelids: the absence of ________
examples of each subphylum:
- arachnids, scorpions, horseshoe crabs, mites, ticks
- crayfish, lobsters, isopods
- insects, centipedes, millipedes
How many appendages do chelicerates have?
Chelicerata have 6 pairs of appendages
What subphylum has pedipalps?
What is the tagmata of spiders and crustaceans?
cephalothorax and abdomen
What is the tagma of uniramians?
Head, thorax, abdomen
Which subphylum uses antennal or green glands? What are these glands used for?
What is the malpighian tubes used for? Which animal uses it?
Difference between centipedes and millipedes?
pairs of legs per segment?
carnivore or herbivore?
What is the cheliped? Which subphylum has this appendage?
first walking leg, has a claw. Crustacea
Excretion of nitrogenous wastes occur by _______ in _______ and ___________
- across thin areas of the cuticle
What is a vector of Lyme disease? Curable?
- Ticks (Chelicerata)
- Yes (antibiotics)
What is the oldest ancestral and most widely occuring larva in Crustaceans?
nauplius. (planktonic, move in shore to develop)
Circulatory system of crayfish: Small, angular ____ that lies in the _____ _____, and enclosed in ________. Blood leaves heart in arters but returns by ______. 3 pairs of ______, which are ___________.
- pericardial sinus
- opening of the heart that receive hemolymph
Arthropod's exoskeleton vs cuticle of annelids.
Exoskeleton = contains ______, goes through ______
Cuticle = made of ______, doesn't ____
- chitin, ecdysis
- collagen, molt
Advantanges of joined appendages?
Efficiency and better locomotion
Function of antennules in crayfish? ______, _____, and ______
touch, taste, equilibrium