Connective Tissue

Mr. HunterKennedy High School

10/17/2012Anatomy and Physiology

Anatomy and Physiology10/18/2012

• OBJECTIVES• SWBAT• COMPARE AND CONTRAST DIFFERENT FORMS

OF CONNECTIVE TISSUE• ANAYLYZE THE COMPONENTS OF CONNECTIVE

TISSUE• Bell Ringer: What type of tissue can areolar

connective tissue develop into when it accumulates and stores lipids?

Connective Tissue General Information

• Most abundant and widely distributed tissue in the body.

• More variation than any other tissue type.

• Location(s): skin, membranes,muscles, bone, nerves and all internal organs

• Function(s): connects tissue to each other and forms a supporting framework for the body as a whole and for individual organs.

• Question(s): What is the most abundant tissue type in the body?

• What is the function of connective tissue?

Connective Tissue General Information

• Differs from epithelial tissue in the arrangement and variety of cells found in the matrix – intracellular material

• Structural quality, appearance of the matrix and fibers determines the qualities of each type of connective tissue.

• Major types of connective tissue:• 1. Areolar 6. Blood• 2. Adipose 7. Hematopoietic• 3. Fibrous• 4. Bone• 5. Cartilage

Areolar and Adipose Connective Tissue

• Areolar (loose) connective tissue is the most widely distributed connective tissue.

• Helps keep the organs of the body together.

• Consists of webs of fibers and a variety of cells embedded within a matrix of soft,sticky gel.

• Collegen fibers: strong and flexible• Elastic fibers: stretchy, helps tissue

return to shorter length after being stretched.

• Question(s): What is the most widely distributed connective tissue?

• What are two main fiber types?

Areolar and Adipose Connective Tissue

• Fascia: fibrous material that helps bind the skin muscle, bones and other organs of the body together.

• It is mainly areolar tissue that composes fascia.

• Areolar tissue can develop into adipose tissue when it begins to store lipids.

• Adipose tissue secretes hormones that help regulate metabolism and fuel storage in the body.

• Question(s): What is fascia?• Wht type of tissue can areolar tissue

develop into when large quantities of lipids are store within its cells?

Areolar and Adipose Connective Tissue

• Reticular connective tissue is composed of thin, delicate webs of collagen fibers called reticular fibers

• Found in bone marrow. It helps to support blood forming cells.

• Dense Fibrous Connective Tissue• Composed of thick bundles of

strong, white collagen fibers arranged in parallel rows.

• Found in tendons (anchors muscle to bone), provides great strength and flexibility. It does not stretch.

REVIEW Anatomy and Physiology

10/17/2012

1. What is the most widely distributed tissue in the body?2. Where is connective tissue located?3. What is the function of connective tissue?4. How does connective tissue differ from epithelial tissue?5. What are the seven major types of connective tissue?6. What are the two types of fibers found in areolar connective

tissue?7. What is reticular connective tissue composed of and where is it

found?8. What are the properties and location of dense fibrous connective

tissue?9. What type of tissue compose fascia?

Bone and Cartilage

• Bone is one of the most highly specialized forms of connective tissue.

• The matrix is hard and calcified.• It forms numerous structural

building blocks called osteons or Haversian systems.

• Bones are a storage area for calcium and provide support and protection for the body.

• Questions(s): What are the names of the numerous structural building blocks found in the bone tissue matrix?

Bone and Cartilage

• Cartilage differs from bone in that its matrix is like a firm plastic or gristlelike gel.

• Cartilage cells, chondrocytes are found in many tiny spaces distributed throughout the matrix.

• Question(s): How does cartilage differ from bone?

• What are the names of cartilage cells and where are they found?

Blood and Hematopoietic Tissue

• Blood is the most unusual form of connective tissue because the matrix is in a liquid state.

• It has transportation and protective functions

• Red and white blood cells are the cell types common to blood.

• Hematopoietic tissue is bloodlike connective tissue located:

1. Red marrow cavities of bones2. Spleen3. Tonsils4. Lymph nodesFunction: formation of blood cells and

defense against diseases.

Muscle Tissue

• Muscle cells have a higher degree of contractility than any other tissue cells.

• If injured muscle cells are slow to heal and are replaced by scar tissue.

• There are three types of muscle tissue:

1. Skeletal2. Cardiac3. Smooth

Question(s): If injured, what happens to muscle tissue?

What are the three types of muscle tissue?

Muscle Tissue

• Skeletal or striated muscle tissue is voluntary because they are controlled at will.

• Individual cells of this tissue type are long and threadlike . They are often called fibers. The cells will be multinucleated.

• Skeletal muscles are attached to bones. When contracted ,the muscles produce controlled and voluntary movements.

• Question: What are the characteristics of striated skeletal tissue?

Cardiac Muscle Tissue

• Cardiac muscle tissue forms the walls of the heart and produces the heartbeat.

• Have light striations similar to skeletal muscle tissue.

• Contain darker bands called intercalated disks.

• The fibers branch and connect to other cardiac branches within the heart to form a mass of contractile tissue.

SmoothMuscle Tissue

• Smooth(visceral) is involuntary.• Smooth muscle cells appear long

and narrow and they lack cross striations.

• They only have one nucleus per cell.• This type of tissue helps to:1. Form the walls of blood vessels2. Hollow organs such as the

intestines3. Other tube shaped structures in the

body.Contractions can help move food

through the digestive tract and change blood vessel diameter.

REVIEW Anatomy and Physiology

10/18/2012

1. What type of connective tissue is one of the most highly specialized forms?

2. Describe the matrix of bone.3. How is cartilage different from bone?4. Where would the body obtain more calcium if it needed an additional

supply?5. Why is blood an unusual form of connective tissue?6. What are the two main functions of blood as a connective tissue?7. What type of connective tissue is found in the red marrow cavities of

bones and the spleen?8. What happens to muscle tissue if it is injured?9. What are the three kinds of muscle tissue?10. Describe the function and location of skeletal, cardiac and smooth muscle.