arthropods

Question 1

what kind if coelom

Answer 1

coelomates

• coelom reduced, mostly hemocoel

Question 2

what does arthropod mean?

Answer 2

jointed foot / appendages

Question 3

exoskeleton?

Answer 3

made of chitin: strong, flexible, nitrogenous polysaccharide

Question 4

what is molting

Answer 4

shedding of exoskeleton

Question 5

are they segmented

Answer 5

yes

Question 6

what are 3 regions in arthropods

Answer 6

• head
• thorax
• abdomen

Question 7

what are appendages specialized for

Answer 7

walking swimming reproducing eating sensory reception

Question 8

nervous system?

Answer 8

• brain
• nerve cord

Question 9

what sense organs are in their head region

Answer 9

• antennae (feelers)
• eyes

Question 10

appendages / structures in crustaceans?

Answer 10

• pinching claw
• swimmerets: paddle-like
• fan-shaped tail (uropod and telson segment)

Question 11

digestive system / feeding structures specific to arthropods?

Answer 11

anterior:
- gastric mill (grinding)
- chitinous teeth

posterior:
- filter preventing coarse particles

Question 12

excretion systems?

Answer 12

insects and spiders: malpighian tubule
crustaceans: green gland

Question 13

reproduction?

Answer 13

separate sexes
- internal fertilization (protects gametes from drying)
- seminal receptacle stores sperm

Question 14

what appendages / structures do insects have specifically?

Answer 14

• wings
• grasshopper: legs, ovipositor to dig holes

Question 15

respiratory systems?

Answer 15

insects: spiracles (openings) and tracheae (tubules)
spiders: book lungs
crustaceans: gills