Which muscle is primarily responsible for the flexion of the elbow joint?

Which muscle is primarily responsible for the flexion of the elbow joint?

Step 1: Understand what flexion means. Flexion is the action of bending a joint.
Step 2: Identify the elbow joint. The elbow is the joint that connects the upper arm to the forearm.
Step 3: Know the muscles around the elbow. There are several muscles that can move the elbow, but we are looking for the one that bends it.
Step 4: Learn about the biceps brachii. The biceps brachii is a muscle located in the upper arm.
Step 5: Connect the biceps brachii to elbow flexion. The biceps brachii contracts to pull the forearm up towards the upper arm, which bends the elbow.
Step 6: Conclude that the biceps brachii is the main muscle responsible for flexing the elbow joint.

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