Chicken Muscle Dissection Lab Analysis

In this lab, each group dissected a chicken and identified major muscles such as the deltoid, the triceps humeralis, and biceps brachii. To make sure we identified all the muscles, we were told to take pictures and label each of the muscles, so we can make sure we identified the muscles correctly and this will help us learn more about the different muscles and characteristics. I learned where all the major muscles are and where they are located on a chicken. We went over the muscles in our lectures, so most of our group knew in general about where each of the muscles were. The lecture helped us greatly for this lab. 

Muscles, bones, and tendons play a huge role in movement. Tendons (muscles attached to bones) are flexible chords of strong fibrous collagen tissue. Bones tissue is a type of dense connective tissue, and the bone protects and supports many vital organs in the body. Muscles are the ones that are used like levers in machines and the muscle supports the muscle so it is able to do it. For example, the shoulder joint is joined with the biceps together by a tendon. Also, the biceps and the radius/ulna are joined by a tendon. Therefore, muscles, bones, and tendons are needed to allow the body to move.

The picture on the left shows the origin or biceps, the tendon, and the insertion of biceps (radius). Basically, the origin is the fixed attachment while the insertion moves with contraction. For example, for the muscle biceps brachii, the origin is the caracoled process, the insertion is the radius, and the action is that it flexes the antebrachium. Another example is the triceps brachii, where the origin is the humerus, the insertion is the olecranon, and action is that it extends the antebrachium.

Chickens and humans both have the same types of tissues: epithelial tissue, muscle tissue, and connective tissue. Chickens have the same types of muscles as humans, such as the forearm, triceps, and biceps. Chickens also have similar bone structure, like the shoulder joint, which lets the chicken move its wings. The differences are that chickens can't move their metacarpals, while humans can. The biceps brachia is smaller in chickens and bigger in humans, but they both help with the flexion of the arms. The muscles in humans are so much smaller in chickens than in humans. 

The sartorius is the longest muscle in the human body. The muscle helps flex, adduct, and rotate the hip. Functionally, the iliotibial tract extends the tensor fascia latae muscle into the lower thigh and leg, allowing it to function as an abductor

Biceps Fermoris performs knee flexion
The quadriceps femurs stabilize the patella (knee cap) and knee joint

The Deltoid is involved in arm abduction along the frontal plane
The Triceps humeralis can fixate the elbow joint.
Biceps Brachii helps control the movement of the shoulder and elbow

Brachioradialis flexes the forearm at the elbow.
Flexor Carpi Ulnaris is involved with flexor and ulnar deviation of the wrist.

Quadriceps Femoris is a group of muscles located in the front of the thigh.

Both the Semimbranosus and Semitendinosus flex the leg and extend the thigh.

Gastrocnemius is involved with plantar flexing the foot at the ankle join and flexing the left at the knee joint.
The peroneus longus everts and plantar flexes the foot.
The Tibialis Anterior movements are dorsiflexion and inversion of the ankle 

The Latissimus Dorsi is involved with extension and adduction
Trapezius extends the scapulae and supports the arm.