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Chapter Nine - Muscle Tissue
na
18
Anatomy
Undergraduate 1
03/07/2010

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Term
Muscle tissue
1. vascularity
2. number of cells
3. Motion
Definition
1. Highly vascularized
2. Highly cellular
3. Contracts
Term
Three Muscle Types
Definition
1. Skeletal
2. Cardiac
3. Smooth
Term
Skeletal Muscle
1. location
2. in/voluntary
3. cell appearance
4. Speed of contraction
5. Ability to regenerate
Definition
1. attaches to skeleton. (bone or cartilage) In the face, it goes through skin.
2. Voluntary, to a certain extent
3. Striated. Multiple nuclei.
4. Can be slow or rapid.
5. low
Term
Cardiac Muscle
1. location
2. in/voluntary
3. cell appearance
4. Speed of contraction
5. Ability to regenerate
Definition
1. heart
2. Involuntary
3. interconnected, short striated columns
4. triggered by a pacemaker, then follows autonomic nerve responses.
5. no regenerative abilities. Scars.
Term
Smooth Muscle
1. location
2. in/voluntary
3. cell appearance
4. Speed of contraction
5. Ability to regenerate
Definition
1. Visceral (hollow) organs
2. Involuntary
3. Cells are long, unstriated, and have one nuclei.
4. slow and sustained speed
5. moderate regenerative abilities.
Term
Organization levels of the Skeletal Muscle
Definition
1. Muscle
2. Fascicles
3. Muscle Fibers
4. Myofibrils
5. Sacromeres
6. Myofilaments
Term
Three types of CT within the muscle
Definition
1. Epimysium - surrounds the muscle
2. Perimysium - surrounds the fascicles
3. Endomysium - surrounds the muscle fibers
Term
True/False: Each muscle is actually an organ
Definition
True: Because it's made of CT and Muscle Tissue
Term
Epimysium
Definition
Covers the muscle. Made of dense regular CT.
Term
Perimysium
Definition
Covers fascicles. Made of Fibrous CT
Term
Endomysium
Definition
Surrounds each Muscle Fiber, made of areolar CT
Term
Fascicle
Definition
multiple fascicles, going everywhich way, provide the muscle with contraction abilities.
Term
Muscle Fibers
Definition
Muscle cell with multiple nuclei
Term
Why do muscle fibers have so many nuclei?
Definition
So they can have multiple mitochondria, to provide the energy for contractions
Term
Myofibrils
Definition
Cytoskeleton of the Muscle Fiber Cell.
Term
Sacromere
Definition
Striates the myofibrils. Made up of thick and thin myofilaments.
Term
Myofilaments
Definition
1. thick - myosin
2. thin - actin
Term
The epimysium can attach to the bone indirectly through
Definition
1. Tendons (rope-like)
2. Aponeurosis (sheet-like)
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