Chicken Wing Dissection Notes
A chicken wing and a human arm are very similar in structure and function.
Types of tissue found in chicken wings (and humans!):
1)
Muscle (found in bundles; we would consider this the meat)
2)
Nerves (thin white threads that run through the muscles; carry messages to and
the brain; there are motor and sensory neurons)
3)
Epithelial tissue-includes:
Skin (to cover body and give protection from germs)
Fat (looks white-yellow; slippery; for warmth, cushioning, and stored energy)
4)
Connective tissue-includes:
Tendons (silvery-white tissue at the end of muscles; they connect muscles to
bones)
Ligaments (cannot be easily seen; connect bone to bone)
5)
Cartilage (bright-white tissue; softer than bone; found at the ends of the
bones; protects the ends of the bones)
6)
Blood vessels (thin red lines running through the muscles; carries oxygen and
nutrients to cells, carries waste away)
7)
Bone-There are 4 layers:
a)
The outer surface of bone is called the periosteum.
(say: pare-ee-os-tee-um). It's a thin, dense membrane that contains nerves
and blood vessels that nourish the bone.
b)
Compact bone. This part is smooth and very hard. It's the part you see
when you look at a skeleton.
c)
Cancellous (say: kan-seh-lus) bone-Within the compact bone are many
layers which looks a bit like a sponge. Cancellous bone is not quite as hard as
compact bone, but it is still very strong.
d)
In many bones, the cancellous bone protects the innermost part of the bone,
the bone marrow. Bone marrow is sort of like a thick jelly, and its job is to
make blood cells.
Movable joints1)
Hinge joint-moves in 1 direction (like a door)
ex) elbow, knees, fingers, toes
2)
Pivot joint-gives a rotating motion
ex)
neck, elbow
from
3)
Ball-in-socket joint-allows greatest motion
ex)
shoulder, hip
4)
Gliding Joint-bones slide past each other
ex)
wrist, vertebrae
Movable joints protected by:
a)
cartilage-protects from scraping/wearing and acts as shock
absorber
b)
synovial fluid-keeps joint moist and lubricated
Immovable Joint1)
Bones of skull-these fuse in your first couple years
Also, study your “Repetitive Stress Injury” reading assignment so you can explain what a repetitive
stress injury is. Know what and where your carpal tunnels are, and what happens in your wrist when
they cause problems.
“Anabolic Steroid: Not Worth the Risk” Be able to list 3 problems steroids can cause
Recall that we have 3 types of muscle:
1) Skeletal (helps our bones move, considered “voluntary”= can choose to move them)
2) Smooth (lines digestive tract)
3) Cardiac muscle-heart muscle