Arthropods And Echinoderms Flashcards
(128 cards)
What new structure developed because of the stiffened exoskeleton?
Joints
What two things stiffen the cuticle?
Protein and chitin
What new process arose because of te stiffened exoskeleton?
Molting
What do joints do
Permit flexibility
What does molting do
Allow for continual growth
What kind of coelom do crustaceans have?
A hemocoel
What replaced the hydrostatic skeleton?
Open sinuses
Are motile cilia present in arthropods?
No, everything is muscle drive
What is arthrpodization
Modification of annelid body plan to current body plan.
What kind of coelom do arthropods have?
Eucoelomate
What kind of symmetry do arthropods have?
Bilateral
Where are arthropods found.
Everywhere.
What is the mode of nutrition for arthropods?
All modes present, but especially detrivores.
What kind of body cavity development do arthropods have?
Protostome
Arthropod modes of nutrition
All
Most conspicuous characteristic of arthropod
Exoskeleton
Tagmata
Fused Somites that form specialized groups
Benefits of arthropods to humans
Food, pollination, medicines, textiles
Harmful arthropod effects
Disease transmission, parasites, competitors
What makes up the exoskeleton/cuticle of arthropods
Chitin and protein
Two layers of arthropod cuticle
Epicuticle and procuticle
Epi cuticle
Outer thin layer
Procuticle
Inner thicker layer
What layers make up procuticle
Exo cuticle (secreted before molt), endocuticle (secreted after molt)