Muscle TissueMuscle tissue is highly vascular & highly cellular

Less matrix = more flexibilityMore blood flow = more ATP made

Elongated shapeActin & myosin – contractile myofilaments

Muscle TissueMuscle Tissue

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Function is to produce movement Three types

Skeletal muscle Cardiac muscle Smooth muscle

Muscle Tissue TypesMuscle Tissue Types

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Skeletal muscle Voluntary control Cells attach to connective

tissue Cells are striated (striped) Cells have more than one

nucleus (multinucleate)

Figure 3.19b

Muscle Tissue TypesMuscle Tissue Types

Slide 3.67Copyright © 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

(uninucleate)Figure 3.19a

Muscle Tissue TypesMuscle Tissue Types

Slide 3.66Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Cardiac muscle Found only in the heart -

Function is to pump blood (involuntary control)

Cells attached to other cardiac muscle cells at intercalated disks and split at the bifurcations

Cells are striated One nucleus per cell

Figure 3.19c

Bifurcation

Nervous TissueConsists of brain, spinal cord, nervesCarry electrical signals2 major cell types:

Neurons: generate & conduct electricityUsually nonregenerative

Neuroglia: support neurons

Brain tumors?

Tissue Repair1. Regeneration is the replacement of destroyed tissue by proliferation of the same type of cells.2. Fibrosis is the replacement of destroyed tissue by connective (scar) tissue.3. The major type of tissue repair that takes place is determined by:

a. The type of tissue injuredb. The severity of the injury

Muscle, Nervous & Tissue Repair review