3 muscles found in mammals

1. Biceps brachii: This muscle is located in the upper arm and is responsible for flexing the elbow joint and rotating the forearm.

2. Gastrocnemius: This muscle is located in the calf and is responsible for plantar flexion of the foot (pointing the toes downward) and flexing the knee joint.

3. Rectus abdominis: This muscle is located in the abdomen and is responsible for flexing the trunk, as well as providing support and stability to the core.

1. Biceps brachii
2. Triceps brachii
3. Quadriceps femoris