뒤로Muscle and Cartilage Types in Anatomy & Physiology
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Location: Attaches mostly to bones, sometimes to skin.
Function: Voluntary movement.
Long cylindrical cells called muscle fibers, which are multinucleated with nuclei pushed to the periphery.
Spindle-shaped cells, uninucleated (one nucleus), no striations, and no branching.
Located in hollow organs (stomach, intestines, blood vessels, urinary bladder).
Function: Propels substances through these organs.
Striations are the striped lines seen on skeletal and cardiac muscle fibers under a microscope.
Located in the walls of the heart.
Striated with branched fibers connected by intercalated discs.
Each fiber has one centrally located, spherical nucleus.
Intercalated discs contain gap junctions for rapid ion and electrical impulse movement.
Produces movement of blood by contracting the heart as a single unit.
Contains chondrocytes housed in lacunae with a smooth, glassy matrix rich in collagen fibers.
Most of the skeleton starts as hyaline cartilage.
Found in ribs to sternum connections, ends of long bones, and nose cartilage.
Provides joint lining and resiliency.
Damaged hyaline cartilage (except nose) cannot repair itself or be surgically fixed.
Has lacunae with chondrocytes and a matrix rich in elastic fibers, allowing flexibility while maintaining shape.
Found in the flexible external ear and epiglottis.
Contains lacunae with chondrocytes and a matrix abundant in parallel collagen fibers.
Acts as a shock absorber.
Located in menisci of the knee, intervertebral discs, and anterior pelvis.