Synarthrodial: Immovable such as the skull.
Amphidiarthrodial: Semimovable such as between the vertebras.
Diarthrodial (synovial joints): Freely movable such as the knees. These
are encapsulated joints that contain synovial fluid to lubricate the joint.Skeletal Muscles
Skeletal muscles are striated fibrous bundles covered with connective tissue
that contract when stimulated by an electrical impulse. During a contraction,
the muscle shortens, called flexing, causing the attached bone to be pulled in
the direction of the contraction.
Sets of opposing muscles are used to articulate a bone. One set of muscles
contracts while the opposing muscles relax, called extending, resulting in bone
movement. The opposing muscle contracts to return the bone to the original
position.CHAPTER 13/ Musculoskeletal Conditions^281
Which of the following takes longer to heal if damaged?
a. Muscles
b. Tendons
c. Ligaments
d. Cartilage
Answer:✔ ROUTINE CHECKUP 1
Soft Tissue Injury
What Went Wrong?
Soft tissue injury is a sprain, strain, or contusion that affects the soft tissue of
the musculoskeletal system.
Astrainis the tearing, twisting, or stretching of a muscle or tendon.
Asprainis injury to a ligament as a result of stretching or tearing the lig-
ament and is commonly the result of an automobile accident, fall, or
sports injury.
Acontusion,commonly known as a bruise or hematoma, occurs when
a blood vessel ruptures beneath the skin and bleeds into the tissue and
causes discoloration.Nursing alert Most ankle injuries in children are sprains.