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1. Why are the rings of cartilages found in trachea of rabbit?
In rabbit, the walls of the trachea are supported by , which aid in the .
2. List out the parasitic adaptations in leech.
a. are the primary bloodsucking organ in leeches.
b. In leech, the serves as a suction pump.
c. Leeches attach themselves to the host's body by ends of the body.
d. The three jaws inside the mouth create a non-painful incision in the host's skin.
e. The leech salivary glands produce , preventing blood from clotting.
g. The is used to store blood. It provides the leech with food for several months.
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