Final answer:
A long arm cast extends from the fingers to the axilla and is used to immobilize and support the upper limb.
Step-by-step explanation:
The type of cast that extends from the fingers to the axilla is known as a long arm cast.
A long arm cast is used to immobilize and support the arm and forearm, extending from the fingers to the axilla (armpit). It is commonly used to treat fractures, dislocations, or other injuries to the upper limb.
For example, if a person has a fracture in the forearm or wrist, a long arm cast may be applied to stabilize the bones and promote healing.