HAP Chicken Wing Dissection- Tissue Unit Review

Gross (large) examples of connective tissues often give one a more complete mental image of connective tissue types.  Eplore the TEXTURE, CONSISTENCY, LOCATION and OTHER physical characteristics of the connective tissues involved with the chicken wing. Observe the skin (superficial and deep portions), the covering of the muscle tissue, the tendons and ligaments, the tissue structures at the joint between the bones, attempt to identify the tissue types based upon what you know. In this investigation you will observe the epithelial, connective and muscle tissue of the chicken wing.

Materials

          Chicken wing

          Paper towels

          Dissection Scissors

           Bone cutter

          Dissecting tray

          Dissecting needle

 

 Procedure:

1.  Obtain the chicken wing from your teacher.

2.  Rinse the chicken wing under running water and thoroughly dry it with paper towels.  Place the chicken wing in a dissecting tray.

3. Examine the skin covering the chicken wing.

4.  Remove the skin from the wing using the scissors.  CAUTION: be careful when using scissors.  Carefully cut the skin along the entire length of the chicken wing.  Try not to cut through the muscles located below the skin. See if you can detect the difference between epidermis and dermis

 5.  Notice the yellowish tissue found in small clumps on the underside of the skin.  This tissue is a type of connective tissue called adipose.

 6.  Observe the muscles on the chicken wing.  The muscles are covered with a layer of connective tissue that give them a slick appearance.  This connective tissue is dense fibrous (regular).  The muscles themselves are formed by bundles of pale pink tissue that surround the bone.

7.  Observe the shiny white tissue, or tendons, at the ends of the muscles.  These are also dense fibrous (regular) connective tissue made thicker by the combined muscle cell coverings.  Tendons attach muscle to bones.

8.  Notice the whitish tissue, or ligaments, between the bones.  These are also dense fibrous (regular) connective tissue.  Ligaments hold bones together.   

9.  CAREFULLY use the bone cutter to cut through the wing joint. Use the scissor to snip away or scrape away any muscle and tendon. Notice the slick white cartilage covering the ends of the bones.  This is hyaline cartilage connective tissue.

10.   CAREFULLY use the bone cutter to cut through the middle of one of the bones.  Use the dissecting needle to scrape away some of the reddish material on the interior of the bone.  This is the bone marrow and some blood cells.  This represents two types of connective tissue the contains reticular c.t. and the blood is of course blood c.t.  Additionally you are looking at compact bone c.t. surrounding the marrow cavity.

11.  Once you have examined each tissue type thoroughly, wrap up all chicken pieces in the paper toweling and throw all chicken material in the LAB WASTE trash and clean your tools by spraying them with the cleaner and blotting them dry before you put them away.  Spray, wipe and dry your lab area. 

12.   Wash your hands with soap and water.

 

Discussion questions you should now be able to answer:

  1. What were some physical characteristics of the chicken skin?
  2. Where was the adipose tissue in the chicken wing? Describe.
  3. What type of tissue covers the muscles in the chicken wing? Describe.
  4. What type of tissue is at the end of the muscles? How is it different than the tissue on the muscles?
  5. What type of tissue covers the ends of the bones? Describe.
  6. What types of tissue are inside the bone? Describe.
  7. Explain how the dissection of the chicken wing relates to the slide of different connective tissues.
  8. Explain how epithelial tissue and connective tissue differ and how they are related.

 

Tissue Characteristics

Type

Physical Characteristics

Dense fibrous (regular)

 

Dense fibrous (irregular)

 

Loose fibrous (areolar)

 

Adipose

 

Hyaline cartilage

 

Fibrocartilage

 

Elastic cartilage

 

Compact bone

 

Cancellous bone

 

 

Matching

May be used more than once or not at all:

a.      dense fibrous tissue

b.     adipose

c.      hyaline cartilage

d.      fibrocartilage

e.      elastic cartilage

f.      compact bone

g.      cancellous bone

 

          1) Cartilage type with great deal of collagen in the matrix

          2) Tissue type that is actually modified areolar tissue

          3) Tissue type that stores lipid molecules

          4) Tissue type composed of Havarsian systems

          5) The most common type of cartilage

          6) Strong tissue that forms tendons and ligaments

          7) Tissue type associated with red bone marrow

          8) Tissue type that forms strong membranes

          9) Connective tissue that forms the disks between vertebrae

          10) Tissue type that forms hard mineral trabeculae