Mainly back and bicep. Or specifically the sternal portion of the pectoralis major, latissimus dorsi, teres major, posterior deltoid, the rhomboids, the middle and lower portions of the trapezius, and the elbow flexors. It also depends on if you're doing chin ups, pull ups or lat pull ups.
The Front Curl works with the biceps.
The leg curl is a muscular resistance exercise that primarily works the quadriceps. It involves the knee joint and develops strength in the quadriceps at the front of the thigh.
Primarily the lower chest muscles
The leg curl and leg extension exercises strengthens two muscle groups. The two muscle groups are the hamstring muscles and the quads or quadricep muscles.
The lateral raise exercise primarily targets the deltoid muscle in the shoulder.
The exercise "lateral raises" primarily targets the deltoid muscle, which is located in the shoulder.
The preacher curl exercise primarily targets the biceps muscle group.
The tricep pushdown exercise primarily targets the triceps muscle group.
The exercise "skull crushers" primarily works the triceps muscle group in the arms.
The pectoralis major muscle is primarily targeted during a bench press exercise.
The exercise "skull crushers" primarily targets the triceps muscle in the back of the upper arm.
The leg extension exercise primarily targets the quadriceps muscle group in the front of the thigh.