Download Nerve activates contraction

Muscle Tissue
Muscle tissue is highly vascular & highly
cellular
Less matrix = more flexibility
More blood flow = more ATP made
Elongated shape
Actin & myosin – contractile
myofilaments
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
 Voluntary control
 Cells attach to connective
tissue
 Cells are striated (striped)
 Cells have more than one
nucleus (multinucleate)
Figure 3.19b
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings
Slide 3.65
Muscle Tissue Types
 Smooth muscle
 Involuntary muscle
 Surrounds hollow
organs
 Attached to other
smooth muscle cells
 No visible striations
 One nucleus per cell
(uninucleate)
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings
Figure 3.19a
Slide 3.67
Muscle Tissue Types
 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
Bifurcation
 Cells are striated
 One nucleus per cell
Figure 3.19c
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings
Slide 3.66
Nervous Tissue
Consists of brain, spinal cord, nerves
Carry electrical signals
2 major cell types:
Neurons: generate & conduct electricity
Usually nonregenerative
Neuroglia: support neurons
Brain tumors?
Tissue Repair
1. 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 injured
b. The severity of the injury
Muscle, Nervous & Tissue Repair review