For this lab, we watched a video of a chicken wing dissection. The goal of the lab was to learn more about the functions of the bones, muscles, joints, nerves, and cartilage and how they work together.
The dissection directions were fairly simple:
- Rinse the wing with water and pat dry
- Place the wing on the dissection tray
- Using scissors, make an incision from the upper part of the wing to the wing tip. Cut the skin from the muscle.
- Pull the skin back to reveal a layer of fat
- Plot the fat layer dry with a paper towel
- Observe the blood vessels and nerves running along the muscle
- Remove the muscles from the bones to observe the periosteum
- Break one of the small bones in the lower chicken wing
- Observe the inner structure of the bone
- Examine the cartilage at the end of the bones
- Clean the station with disinfectant
- What is the very first step in dissecting the chicken wing?
Using scissors, make an incision from the upper part of the wing to the wing tip. Cut the skin from the muscle.
- What happens when you pull on the triceps muscle?
The biceps muscle relaxes when the triceps muscle is pulled.
- What is an extensor?
An extensor extends a part of the body. For example, the triceps is an extensor muscle because it extend the elbow.
- What happens when you pull on the biceps muscle.
When the biceps muscle is pulled, the triceps muscle relaxes.
- What is a flexor?
A flexor muscle bends the joint.
- What type of tissue makes up the “meat” of a chicken?
Muscle tissue makes up the “meat” of a chicken.
- What is the function of ligaments?
Tough white cord like structure that connect one bone to another.
- What is the function of tendons?
Tendons connect muscles to bones.
- What is the function of the cartilage found at a joint?
Cartilage reduces friction and protects the ends of the bones when the joint moves.
- There is a yellowish tissue clumped together beneath the skin of the chicken wing. This is fat tissue, made of fat cells. What are two functions of this fat?
This fat stores energy and insulates the body.
- Based on your observations, EXPLAIN how and why muscles work in “opposing pairs” to move bones.
Bones bend in one direction, so muscles working in “opposing pairs” allows one muscles to pull and bend the joint, while the other one can straighten it.