PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing.

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Presentation transcript:

PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PART D 3 Cells and Tissues

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue  Found everywhere in the body  Includes the most abundant and widely distributed tissues  Functions  Binds body tissues together  Supports the body  Provides protection

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Characteristics  Variations in blood supply  Some tissue types are well vascularized  Some have a poor blood supply or are avascular  Extracellular matrix  Non-living material that surrounds living cells

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Extracellular Matrix  Fibers  Three types  Collagen (white) fibers  Elastic (yellow) fibers  Reticular fibers

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types  Bone (osseous tissue)  Composed of  Hard matrix of calcium salts  Large numbers of collagen fibers  Used to protect and support the body

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types Figure 3.19a

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types  Hyaline cartilage  Most common type of cartilage  Composed of  Abundant collagen fibers NO blood supply-avascular  Locations  Larynx, Ends of bones!!  Entire fetal skeleton prior to birth

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types Figure 3.19b

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types  Elastic cartilage  Provides elasticity  Location  Supports the external ear  Fibrocartilage  Highly compressible  Location  Forms cushion-like discs between vertebrae

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types Figure 3.19c

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types  Dense connective tissue (dense fibrous tissue)  Main matrix element is collagen fiber  Locations  Tendons—attach skeletal muscle to bone  Ligaments—attach bone to bone at joints  Dermis—lower layers of the skin

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types Figure 3.19d

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types  Loose connective tissue types  Areolar tissue  Most widely distributed connective tissue  Soft, pliable tissue like “cobwebs”  Functions as a packing tissue  Can soak up excess fluid (causes edema)

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types Figure 3.19e

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types  Loose connective tissue types: Adipose-FAT!  Many cells contain large lipid deposits  Functions  Insulates  Protects organs  Serves as fuel storage

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types Figure 3.19f

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types  Reticular connective tissue  Delicate network of fibers FNX: Phagocytize bacteria  Forms network of lymphoid organs  Lymph nodes  Spleen

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types Figure 3.19g

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types  Blood (vascular tissue)  Fibers are visible during clotting  Functions as the transports - food & oxygen

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue Types Figure 3.19h

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Tissue  Function is to produce movement  Three types  Skeletal muscle  Cardiac muscle  Smooth muscle

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Tissue Types  Skeletal muscle  Under voluntary control  Contracts to pull on bones or skin  Produces facial expressions or body movements or  Characteristics of skeletal muscle cells  Striated/Banded  Long, cylindrical

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Tissue Types Figure 3.20a

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Tissue Types  Cardiac muscle  Under involuntary control  Found only in the heart  Function is to pump blood  Characteristics of cardiac muscle cells  Striated/banded  branched ends

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Tissue Types Figure 3.20b

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Tissue Types  Smooth muscle  Under involuntary muscle  Found in walls of hollow organs such as stomach, uterus, and blood vessels  Characteristics of smooth muscle cells  No visible striations  Spindle-shaped cells

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Tissue Types Figure 3.20c

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Nervous Tissue  Composed of neurons and nerve support cells  Function is to send impulses to other areas of the body  Irritability  Conductivity

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Nervous Tissue Figure 3.21

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Tissue Repair (Wound Healing)  Regeneration  Replacement of destroyed tissue by the same kind of cells  Fibrosis  Repair by dense (fibrous) connective tissue (scar tissue)  Determination of method  Type of tissue damaged  Severity of the injury

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Events in Tissue Repair  Capillaries become very permeable  Introduce clotting proteins  A clot walls off the injured area  Formation of granulation tissue  Growth of new capillaries  Rebuild collagen fibers  Regeneration of surface epithelium  Scab detaches

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Regeneration of Tissues  Tissues that regenerate easily  Epithelial tissue (skin and mucous membranes)  Fibrous connective tissues and bone  Tissues that regenerate poorly  Skeletal muscle  Tissues that are replaced largely with scar tissue  Cardiac muscle  Nervous tissue within the brain and spinal cord

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Developmental Aspects of Tissue  Epithelial tissue arises from all three primary germ layers  Muscle and connective tissue arise from the mesoderm  Nervous tissue arises from the ectoderm  With old age, there is a decrease in mass and viability in most tissues