Module #12 Review Questions Flashcards
(47 cards)
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
