Chapter 4 Flashcards
The Muscular System
Function of muscles
Make body movement possible, hold body erect, move body fluids, and produce body heat
Combining forms for muscles
muscul/o, my/o, myos/o
Function of fascia
cover, support, and separate muscles
Combining form for fascia
fasci/o
Function of tendons
attach muscles to bones
Combining forms for tendons
ten/o, tend/o, tendin/o
bi
twice, double, two
-cele
hernia, tumor, swelling
dys-
bad, difficult, or painful
fasci/o
fascia, fibrous band
fibr/o
fibrous tissue, fiber
-ia
abnormal condition, disease, plural of -ium
-ic
pertaining to
kines/o, kinesi/o
movement
my/o
muscle
-plegia
paralysis, stroke
-rrhexis
rupture
tax/o
coordination, order
ten/o, tend/o, tendin/o
tendon, stretch out, extend, strain
ton/o
tone, stretching, tension
tri-
three
The long, slender cells that make up muscles
muscle fibers
Fascia
flexible band of connective tissue that envelops, separates, or binds together muscles or groups of muscles
myofascial
pertaining to muscle tissue and fascia
A narrow band of nonelastic, dense, fibrous connective tissue that attaches a muscle to a bone
Tendon
Difference between ligaments and tendons.
Ligaments join bone to bone. Tendons attach muscle to bone.
Patellar tendon
attaches muscles to the bottom of the patella
Achilles tendon
attaches the gastrocnemius (calf) muscle to the heel bone
A sheet-like fibrous connective tissue resembling a flattened tendon that connects muscles together or to a bone
aponeurosis (plural, aponeuroses)
3 types of muscle tissue
skeletal, smooth, myocardial
Type of muscles attached to bones and make body motions possible
skeletal muscle (aka voluntary muscles and aka striated (striped) muscles)
Type of muscles located in walls of internal organs and function to move and control the flow of fluids through these structures
smooth muscles (involuntary & unstriated & visceral)
Form the muscular walls of the heart
myocardial muscles (aka myocardium or cardiac muscle)- striated but involuntary
The stimulation of a muscle by an impulse transmitted by a motor nerve
muscle innervation
neuromuscular
pertaining to the relationship between a nerve and a muscle
antagonistic
working in opposition to each other
The tightening of a muscle
contraction
The center of a muscle
belly
Occurs when a muscle returns to its original form
relaxation
The movement of a limb away from the midline of the body
abduction
ab-
away from
duct
to lead
-ion
action
Type of muscle that moves a body part away from the midline
abductor
The movement of a limb toward the midline of the body
adduction
ad-
toward
Type of muscle that moves a body part toward the midline
adductor
Decreasing the angle between two bones by bending a limb at a joint
Flexion
Type of muscle that bends a limb at a joint
flexor muscle
Increasing the angle between two bones or the straightening out of a limb
Extension
ex-
away from
tens
to stretch out
-ion
action
flex
to bend
Type of muscle that straightens a limb at a joint
extensor muscle
The extreme or overextension of a limb or body part beyond its normal limit
hyperextension
The act of raising or lifting a body part
elevation
Type of muscle that raises a body part
levator
levator anguli oris
muscles of the face that raise the corners of the mouth into a smile.
The act of lowering a body part
depression
Type of muscle that lowers a body part
depressor muscle
depressor anguli oris
facial muscles that lower the corner of the mouth into a frown
A circular movement around an axis such as the should joint
rotation
An imaginary line that runs lengthwise through the center of the body
axis
The circular movement at the far end of a limb
circumduction
Type of muscle that turns a body part on its axis
rotator muscle
The group of muscles and their tendons that hold the head of the humerus in place as it rotates with the shoulder joint
rotator cuff
The act of rotating the arm or the leg so that the palm of the hand or sole of the foot is turned forward or upward
supination
The act of rotating the arm or leg so that the palm of the hand or sole of the foot is turned downward or backward
pronation
The movement that bends the foot upward at the ankle
dorsiflexion
The movement that bends the foot downward at the ankle
plantar flexion
Plantar
pertaining to the sole of the foot
Where the muscle begins
origin
Where the muscle ends
insertion
More movable muscle attachment and farthest from the midline
insertion
The muscle that helps bend the neck and rotate the head
sternocleidomastoid muscle
stern/o
sternum/breastbone
cleid/o
collar bone
Muscle that inserts at one point of insertion into the mastoid process
mastoid muscle
Pair of muscles that make flexion and extension of the wrist possible
flexor and extensor carpi muscles
A thick, fan-shaped muscle situated on the anterior chest wall.
pectoralis major
Pectoral
relating to the chest
Lateralis
toward the side
Large muscle toward the outer side of the leg
vastus lateralis
Medialis
toward the midline
a muscle toward the midline of the leg
vastus medialis
Oblique
slanted or at an angle
Sphincter
a ring-like muscle that tightly constricts the opening of a passageway
transverse
in a crosswise direction
rectus
in straight alignment with the vertical axis of the body
bi-
2
tri-
3
-ceps
head
muscle formed from 2 divisions
biceps brachii