Tissues Muscle Nervous Tissue Chapter 3 Muscle Tissue

Tissues: Muscle & Nervous Tissue Chapter 3

Muscle Tissue · Function is to produce movement · Three types · Skeletal muscle · Cardiac muscle · Smooth muscle Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 3. 64

Muscle Tissue Types · Skeletal muscle · Can be controlled voluntarily · Cells attach to connective tissue to bones · Cells are striated · Cells have more than one nucleus Figure 3. 19 b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 3. 65

Skeletal Muscle

Muscle Tissue Types · Cardiac muscle · Found only in the heart · Function is to pump blood (involuntary) · Cells attached to other cardiac muscle cells at intercalated disks · Cells are striated · One nucleus per cell Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 3. 19 c Slide 3. 66

Cardiac Muscle

Muscle Tissue Types · Smooth muscle · Involuntary muscle · Surrounds hollow organs · Attached to other smooth muscle cells · No visible striations · One nucleus per cell Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 3. 19 a Slide 3. 67

Smooth Muscle

Quick Quiz n What type(s) of muscle tissue produce involuntary movement? n What type(s) of musce tissue are striated? n What is the function of smooth muscle?

Nervous Tissue · Neurons and nerve support cells · Function is to send impulses to other areas of the body · Irritability · Conductivity Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 3. 20 Slide 3. 68

Nervous Tissue

Tissue Repair · 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 © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 3. 69

Events in Tissue Repair · Capillaries become very permeable · Introduce clotting proteins · Wall off injured area · Formation of granulation tissue · Regeneration of surface epithelium Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 3. 70

Regeneration of Tissues · Tissues that regenerate easily · Epithelial tissue · Fibrous connective tissue 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 © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 3. 71

Quick Quiz n What type of tissue is this: n What is the function of nervous tissue? n What type(s) of tissues regenerate poorly?