Connective Tissue Mr. Hunter Kennedy High School 10/17/2012Anatomy and Physiology
Anatomy and Physiology 10/18/2012• 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 • Most abundant and widelyInformation 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?
• Differs from epithelial tissue in theConnective Tissue General arrangement and variety of cellsInformation 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 (loose) connective tissue isAreolar and Adipose the most widely distributedConnective Tissue 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?
• Fascia: fibrous material that helpsAreolar and Adipose bind the skin muscle, bones andConnective Tissue 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?
• Reticular connective tissue isAreolar and Adipose composed of thin, delicate webs ofConnective Tissue 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 10/17/20121. 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 is one of the most highlyBone and Cartilage 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?
• Cartilage differs from bone in that itsBone and Cartilage 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 is the most unusual form ofBlood and Hematopoietic connective tissue because the matrixTissue 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 bones 2. Spleen 3. Tonsils 4. Lymph nodes Function: formation of blood cells and defense against diseases.
• Muscle cells have a higher degree of contractility than any other tissueMuscle Tissue cells. • If injured muscle cells are slow to heal and are replaced by scar tissue. • There are three types of muscle tissue: 1. Skeletal 2. Cardiac 3. Smooth Question(s): If injured, what happens to muscle tissue? What are the three types of muscle tissue?
• Skeletal or striated muscle tissue is voluntary because they areMuscle Tissue 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 forms the walls of the heart and produces theCardiac Muscle Tissue 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.
• Smooth(visceral) is involuntary.SmoothMuscle Tissue • 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 vessels 2. Hollow organs such as the intestines 3. 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 10/18/20121. 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.