Muscles Flashcards
Contraction of skeletal muscles is responsible for the overall movements of the body, such as walking, running, and manipulating objects with the hands.
Movement of the body
Skeletal muscles constantly maintain tone, which keeps us sitting or standing erect.
Maintenance of posture.
Muscles of the thorax carry out breathing movements.
Respiration
When skeletal muscles contract, heat is given off as a by-product. This released heat is critical to the maintenance of body temperature.
Production of body heat
Skeletal muscles are involved in all aspects of communication, including speaking, writing, typing, gesturing, and facial expressions.
Communication
The contraction of smooth muscle within the walls of internal organs and vessels causes those structures to constrict. This constriction can help propel and mix food and water in the digestive tract, propel secretions from organs, and regulate blood flow through vessels.
Constriction of organs and vessels.
The contraction of cardiac muscle causes the heart to beat, propelling blood to all parts of the body
Contraction of the heart.
is the ability of muscle to shorten forcefully, or contract.
Contractility
contraction increases pressure inside the organ it surrounds, such as the intestines or the heart.
Smooth muscle or cardiac muscle contraction
the ability of muscle to shorten forcefully, or contract.
Contractility
causes structures to which they are attached to move.
*Skeletal muscle contraction
Increases pressure inside the organ it surrounds.
*Smooth
muscle/cardiac
muscle contraction
Separates muscle fascicles from each other
Perimysium
Is surrounded by a connective tissue sheath called the
Epimysium
- loose connective tissue that surrounds each muscles fiber
Endomysium
Muscle consists of
skeletal muscle tissue, nervous tissue, connective tissue, and adipose tissue
single cylindrical fiber, with several nuclei located at its periphery
Muscle Fiber
