1. what are the five muscles that form a box to control the wrist?
2. what type of muscles attach to the fingers?
3. what muscle supinates the hand?

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Following are the answeres-

Explanation:

1)  Flexor pollicis longus, Flexor digitorum profundus, Flexor digitorum superficialis, Flexor carpi ulnaris and  Flexor carpi radialis  are the muscles that form a box to control the wrist.

2) Tendons are attached to the fingers.

3) The supinator basically arises from the lateral condyle, the external lateral and orbicular ligaments and the triangular surface of the ulna below the sigmoid cavity.

they deliver oxygen to the blood