Module #12 Review Questions Flashcards
Name the five characteristics that arthropods have in common.
- An Exoskeleton
- Body segmentation
- Jointed appendages
- Ventral nervous system
- Open circulatory system
Because they have an exoskeleton, arthropods must do what in order to grow?
Molt
An arthropod’s body might consist of what three segments?
The head, the thorax, the abdomen
An arthropod’s body might consist of what two segments?
The cephalothorax and the abdomen
The eye that consists of one lens is called what?
Simple
An eye consisting of many lenses is called what?
Complex
What class of phylum Arthropoda does the crayfish belong to?
Crustacea
From where does the crayfish get its sense of balance?
Its antennules
From where does a crayfish get its sensitive senses of taste and touch?
Its antennae
What are the crayfish’s claws called?
Its chelipeds
What two items on the crayfish posterior end are used for swimming?
The uropod and telson
On the crayfish what is used for swimming and reproduction?
The swimmerets
A crayfish gets oxygen that has been dissolved in the water by passing water over what?
It’s gills
In what cavity does the crayfish’s blood collect?
The pericardial sinus
In the crayfish, what main organ rest in the pericardial sinus?
The heart
In the crayfish’s heart, each opening has a valve that does what when the heart is ready to pump?
Closes
In an open circulatory system, the heart pumps the blood into blood vessels. These blood vessels have what characteristic?
They are opened at either end
In an open circulatory system, where do the blood vessels dump the blood?
Into the various body cavities
Gravity causes the blood to fall into the what, where it is collected by blood vessels that are open at one end.
The sternal sinus
After the blood is dumped in the sternal sinus, the blood vessels carry the blood back to what area?
The pericardial sinus
On the way back to the pericardial sinus the blood passes through the gills where it can release what and absorb what?
Carbon dioxide and oxygen
In a crayfish the blood is cleaned by what?
The green gland
The crayfish breaks its food into small chunks using what?
Its mandibles
After breaking down the food with it’s mandibles, the food enters a short what?
Esophagus
After breaking down the food with it’s mandibles, the food enters a short what?
The stomach
The crayfish’s stomach has two regions. The first region does what?
Grinds the food into fine particles
The crayfish’s stomach has two regions. The second region does what?
Sorts the particles
In the second region of the crayfish’s stomach, if the particles are small enough they are sent where?
Digestive glands
In the second region of the crayfish’s stomach, if the particles are too large they are sent where?
To the intestine
In the crayfish’s digestive system, what happens to anything that remains at the end of the intestine?
It is expelled out the anus
The crayfish’s brain is comprised of two what?
Ganglia each having a nerve cord attached
What is t the base of the antennules, which gives the crayfish its sense of balance?
Statocyst
Spiders are in what class?
Arachnida
Class arachnida have five common characteristics. Name them.
- 4 pairs of walking legs,
- A cephalothorax,
- 4 pairs of simple eyes,
- No antennae
- Respiration done through book lungs.
Spiders spin webs made of silk that is produced in what?
The silk glands
With what does the spider use to spin a web?
The spinnerets
Centipedes are aggressive predators with how many legs per segment?
Two
Millipedes are docile herbivores with how many legs per segment?
Four
Members of class insecta have four characteristics in common. Name them.
- Three pairs of walking legs
- Wings at some stage of their life
- One pair of antennae
- Three body segments
Insects breathe through what?
Tracheas
Complete metamorphosis has what four stages?
Egg, larva, pupa, and adult
Incomplete metamorphosis has what three stages?
Egg, nymph and adult
Butterflies and moths belong to what order?
Lepidoptera
Ants, bees, and wasps belong in what order?
Hymenoptera
Beetles belong to what order?
Coleoptera
Flies, gnats and mosquitoes belong to what order?
Diptera
Grasshoppers and crickets belong in what order?
Orthoptera
