Last week, we watched a video on a super interesting chicken wing lab. We are preparing for our cat dissection and it was super important for us to be familiar with dissection in general and the precautionary steps that come with it. Through the video, I learned a ton about different tendons, muscles and overall structure of the chicken wing. After finishing watching the video, we were directed to a different website that explained the human elbow in detail. This was super interesting because I was able to take the knowledge I learned about a chicken wing and apply it to connect it to the human elbow and notice if they have any similarities.
The procedure was very straightforward and easy to follow. The steps are listed below:
- wash and dry chicken wing thoroughly, then place on the dissection tray
- Use the scissors to make an incision from the wing tip to the upper part of the wing
- Cut the skin from the muscle and pull the skin back to observe the layer of fat underneath
- Observe and take note of the blood vessels, muscle, white nerves, and tendons
- Now remove the muscles directly from the bone so you can observe the periosteum
- break one small bone and observe the bone’s interior and also the ligaments and cartilage surrounding it.
- Clean up your area!
To go along with this lab, we were instructed to do separate research to answer a bunch of different questions:
- What is the very first step in dissecting the chicken wing?
After we get the chicken wing, it is very important to rinse it and then pat it dry with a paper towel. Once that is finished, place it on the dissecting tray.
- What happens when you pull on the triceps muscle?
When you pull on the triceps muscle, the tricep muscle contracts while the bicep muscle relaxes. This results in the extension of the elbow.
- What is an extensor?
An extensor is any muscle that, when contracting, extends or straightens a different part of the body.
- What happens when you pull on the biceps muscle?
When you pull on the biceps muscle, the biceps tighten and contract while the triceps relax. This results in the flexing of the elbow.
- What is a flexor?
This is an opposite of an extender in the sense that the contraction of it results in a bend of a different limb or part of the body.
- What type of tissue makes up the “meat” of a chicken?
The “meat” of a chicken is the muscle.
- What is the function of ligaments?
Ligaments are at the end of the bones and they connect one bone to another.
- What is the function of tendons?
Tendons connect muscles to bones. They are at the end of the muscles.
- What is the function of the cartilage found at a joint?
It protects the bone when it moves by offering a layer of protection.
- 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?
The two functions is to serve as a shock absorber and to insulate the chicken and protect the deeper tissue.
- Based on your observations, EXPLAIN how and why muscles work in “opposing pairs” to move bones.
Muscles work in pairs because no one muscle could extend or lengthen (they can only contract). This makes moving bones alone nearly impossible. The solution to this is having the muscles work in pairs. One muscle contracts while the other relaxes and vice versa to extend and lengthen the elbow. This helps with smooth transition and movement of the bones.
I learned so much from this lab!