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Arthropods & Crayfish Dissection
arthropods have what body type?
What subphylum has no antennae?
What subphylum has 2 sets of antennae?
hexapoda and myriapoda
what two subphylums have 1 pair of antennae?
true/false Arthropods are triploblastic?
what kind of symmetry do arthropods have?
deurostomes or protostomes?
segmented body, segments called:
what kind of skeleton?
what is the skeleton composed of?
arthropods have what kind of circulartory system?
what kind of body cavity? (hint: not acoelomate, coelomate, or pseudocoelomate)
fluid that functions as both blood and lymph, flows through the hemocoel
true/false arthropods have an incomplete digestive system
exoskeleton and jointed appendages
name two reasons for the success of arthropods
Subphylum Chelicerta: first pair of appendages called:_____ these find and manipulate food
Subphylum Chelicerta: second pair of appendages called: ______ these assist in movement
subphylum that includes horseshoe crabs, spiders, scorpians, ticks
part of the skeleton that protects/covers the head (cephalothorax) in the class Merostomata (horseshoe crabs)
part of the skeleton that protects/covers the abdomen in the class Merostomata (horseshoe crabs)
tail like structure that aids in anchoring in the class merostomata (horseshoe crabs)
aka prosoma, the head portion that has the head and appendages in the class merostromata (horseshoe crabs) and arachnida
photoreception in the class Merostomata (horseshoe crabs)
receptors in the eyes in the class Merostomata (horseshoe crabs)
the simple eyes smaller than the compound eyes in the class Merostomata (horseshoe crabs)
protect book gills in the class Merostomata (horseshoe crabs)
class that has spiders, ticks, mites, and scorpions
In the arachnida, the chelicerae are modified into these:
houses the reproductive, digestive, respiratory, and web-spinning organs
respiration located on the sides of the abdomen
thin leaf-like structure for respiration
spinning webs, three paired structures at the posterior of the abdomen
Subphylum Crustacea: how many pairs of walking legs?
Subphylum Crustacea: first pair of walking legs modified into pincers are called the:
Subphylum Crustacea: name the order that contain the crabs, lobsters, crayfish, and "true" shrimp
What class is the crayfish in?
Crayfish Dissection: longer paired appendages on the head that function as chemosensory and tactile receptors
Crayfish Dissection: shorter, paired appendages on the head used for chemosensory, tactile, and equilibrium reception
Crayfish Dissection: light detecting and image forming, held up on stalks
Crayfish Dissection: pointed region between the eyes
Crayfish Dissection: tail fin, (middle) for propulsion
Crayfish Dissection: on either side of the telson, also aid in propulsion
Crayfish Dissection: pincers for food capture and defense, first pair of walking legs
Crayfish Dissection: locomation walking on land and crawling on substrate
Crayfish Dissection: abdominal appendages modified for swimming
Crayfish Dissection: male, larger swimmerets used for transfering sperm during copulation*
Crayfish Dissection: female, receives sperm
Crayfish Dissection: attach from stomach to carapace to help move food
Crayfish Dissection: mastication of food, attach from side of stomach to mandible
Crayfish Dissection: chitinous teeth that grind food into a liquid mush
Crayfish Dissection: houses the gastric mill, thick walled anterior portion of the stomach
Crayfish Dissection: thin walled chamber where chemical digestion of food occurs
Crayfish Dissection: nutrient absorbtion into the blood
Crayfish Dissection: accessory digestive organ; secretes enzymes into the pyloric stomach
Crayfish Dissection: paired with excretory organs that release waste through small pores of the body
Crayfish Dissection: contains ostia through which hemolyph enters the heart; specialized muscular chamber that pumps hemolyph into the hemocoel
Crayfish Dissection: respiration and some excretion of nitrogenous waste