Chicken Dissection Lab

in this lab we dissected a chicken to determine and see the muscle groups and tendons up close. This lab allowed us to see each muscle groups underneath the skin and actually still connected to the body. The muscles play a role in helping your body move while being attached to tendons that allow the movement of the muscle to be preformed by attaching to the bone, which stabilizes the muscle and holds it in place. The physical difference of insertion vs origin of a tendon is that at the insertion the tendon is attached to the muscle and the origin is where it attaches to the bone. The chicken muscles compared to the human muscle is 1. the chickens pectorals major are longer in comparison to the rest of the body than a humans pectorals compared to its body. 2. the chickens deltoid and trapizous are inverse to the body were as humans are aligned with the shoulder. 3. the chickens ulna and radius is flipped or opposite to the humans ulna and radius in the forearm.

(Chickens thigh: satorius- runs down front end of thigh, flexes the thigh and allows crossing of leg/ illotibialis- covers lateral side of of thigh, extends the thigh and flexes leg/ bicep femoris- lies medial to the section of the illotibialis it flexes leg,

Power when running)

(Chicken wing: branchioradialis- largest muscle on the superior side of the Lower wing)

(Chicken breast: pictoralis major- larger superficial breast muscle of the bird that connect to each side of the shoulder to the humerus pull wings ventrally/ pectoralis minor- runs along the sternum lifts the wing does ally helps wing flight)

(Chicken wing: trapezius- muscle run perpendicular from back bone to shoulder/ latissimus Dorsi- directly distal to the trapezius, from spine to wing or arm pit and attach the posterior side of the humerus/ deltoid- helps raise the upper wing , center top of shoulder/ bicep brachii- cranial side of upper wing it arm in bird, helps bend the wing/ triceps humeralis- inferior side of the upper wing, extends the wing)

(Chicken lying on posterior side)