Final answer:
The internal rectus muscle is an abductor muscle with a single origin that is located in the eye. The biceps muscle is a flexor muscle with two origins located in the arm. The abductor muscle is a versatile muscle with multiple origins located in various parts of the body.
Step-by-step explanation:
The internal rectus muscle is an abductor muscle that has a single origin. It is located in the eye and its fiber direction is straight.
The biceps muscle is a flexor muscle that has two origins. It is located in the arm and its fiber direction is parallel.
The abductor muscle is an abductor muscle that has multiple origins. It is located in various parts of the body and its fiber direction can vary.