Chicken Wing Dissection
How do the muscles, bones, and tendons work together to move a
joint of a chicken wing and how do they compare to a human arm?
Although many differences exist between the anatomy of humans and chickens, one structure that shows
similarities in muscle pairing and range of motion is a bird’s wing. In this activity you will study chicken
wing structure and function, which is comparable to that of the human arm.
Bones of the Human Arm
The arm reaches from the shoulder to the wrist. It consists of two
basic parts:
(1) the upper arm, which extends between the shoulder and the
elbow, and
(2) the forearm, which extends between the elbow and the wrist.
The upper arm is formed by one long bone, the humerus. The top
end of the humerus is rounded and fits into a cup-shaped
depression in the scapula, or shoulder bone, forming a ball-andsocket
joint. Ball-and-socket joints allow for circular movement.
The two bones of the forearm are the radius and the ulna. The ulna
is fixed in position, but the radius can rotate over the ulna. This
makes rotation of the forearm possible in motions such as twisting a
screwdriver.
Skeletal Muscles of the Human Arm
Skeletal muscles are responsible for hundreds of movements.
When an organism wants to move, signals travel from the brain to
the skeletal muscle cells. The muscle cells then
contract, or get shorter.
Strands of tough connective tissue connect the
skeletal muscles to bones. These strands of tissue are
called tendons. When a muscle that connects two
bones gets shorter, the bones are pulled closer to each
other. For example, tendons attach the biceps muscle to
a bone in your shoulder and to a bone in your forearm.
When the biceps muscle shortens, your forearm bends
toward your shoulder.
The skeletal muscles often work in pairs to produce
smooth, controlled motions by pulling, or contracting. When one muscle in the
pair bends part of the body, the other muscle extends
or straightens part of the body.
Bones of the Chicken
The upper wing consists of a humerus,
which is at one end, and the ulna and the
radius at the lower wing. These bo
Chicken Wing Dissection
How do the muscles, bones, and tendons work together to move a
joint of a chicken wing and how do they compare to a human arm?
Although many differences exist between the anatomy of humans and chickens, one structure that shows
similarities in muscle pairing and range of motion is a bird’s wing. In this activity you will study chicken
wing structure and function, which is comparable to that of the human arm.
Bones of the Human Arm
The arm reaches from the shoulder to the wrist. It consists of two
basic parts:
(1) the upper arm, which extends between the shoulder and the
elbow, and
(2) the forearm, which extends between the elbow and the wrist.
The upper arm is formed by one long bone, the humerus. The top
end of the humerus is rounded and fits into a cup-shaped
depression in the scapula, or shoulder bone, forming a ball-andsocket
joint. Ball-and-socket joints allow for circular movement.
The two bones of the forearm are the radius and the ulna. The ulna
is fixed in position, but the radius can rotate over the ulna. This
makes rotation of the forearm possible in motions such as twisting a
screwdriver.
Skeletal Muscles of the Human Arm
Skeletal muscles are responsible for hundreds of movements.
When an organism wants to move, signals travel from the brain to
the skeletal muscle cells. The muscle cells then
contract, or get shorter.
Strands of tough connective tissue connect the
skeletal muscles to bones. These strands of tissue are
called tendons. When a muscle that connects two
bones gets shorter, the bones are pulled closer to each
other. For example, tendons attach the biceps muscle to
a bone in your shoulder and to a bone in your forearm.
When the biceps muscle shortens, your forearm bends
toward your shoulder.
The skeletal muscles often work in pairs to produce
smooth, controlled motions by pulling, or contracting. When one muscle in the
pair bends part of the body, the other muscle extends
or straightens part of the body.
Bones of the Chicken
The upper wing consists of a humerus,
which is at one end, and the ulna and the
radius at the lower wing. These bo
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