Tissues: Muscle & Nervous Tissue Chapter 3

Muscle Tissue Slide 3.64 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Function is to produce movement  Three types  Skeletal muscle  Cardiac muscle  Smooth muscle

Muscle Tissue Types Slide 3.65 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Skeletal muscle  Can be controlled voluntarily  Cells attach to connective tissue to bones  Cells are striated  Cells have more than one nucleus Figure 3.19b

Skeletal Muscle

Muscle Tissue Types Slide 3.66 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  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 Figure 3.19c

Cardiac Muscle

Muscle Tissue Types Slide 3.67 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Smooth muscle  Involuntary muscle  Surrounds hollow organs  Attached to other smooth muscle cells  No visible striations  One nucleus per cell Figure 3.19a

Smooth Muscle

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

Nervous Tissue Slide 3.68 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Neurons and nerve support cells  Function is to send impulses to other areas of the body  Irritability  Conductivity Figure 3.20

Nervous Tissue

Tissue Repair Slide 3.69 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  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

Events in Tissue Repair Slide 3.70 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Capillaries become very permeable  Introduce clotting proteins  Wall off injured area  Formation of granulation tissue  Regeneration of surface epithelium

Regeneration of Tissues Slide 3.71 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  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

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