Muskoletal Flashcards
-specialized contractile
tissue
MUSCLE TISSUE
3 types of muscle tissue
Cardiac muscle, (striated)
Skeletal muscle,(striated)
Smooth muscle, (n0n-striated)
-which forms the muscular layer of
the heart(myocardium)
Cardiac muscle, (striated)
-which attaches to the bones and provides voluntary
movement.
Skeletal muscle,(striated)
-which attaches to the bones and provides voluntary movement.
Skeletal muscle,(striated)
-which comprises the walls of blood vessels and hollow
organs
Smooth muscle, (n0n-striated)
Cardiac and smooth muscles are
innervated by the ___
, thus being
controlled involuntarily by the
autonomic centers in our brain
autonomic nervous system
The skeletal muscles are the only
ones that we can control by the
power of our will, as they are
innervated by the ___ part of
the nervous system.
Somatic
–the main functional units
of the muscular system.
There are more than 600
muscles in the human body.
They vary greatly in shape
in size with the smallest one
being the stapedius muscle
in the inner ear, and the
largest one being the
quadriceps femoris muscle
in the thigh
Skeletal muscles
Smallest muscle
Stapedius of inner ear
Largest muscle
Quadrecips femoris in the thigh
• muscles of the facial expression,
• mastication,
• muscles of the orbit,
• tongue,
• pharynx, larynx, and the neck
Muscles of the head and neck,
-anterior and lateral abdominal muscles,
and pelvic floor
Muscles of the trunk,
-include muscles of the
shoulder, arm, forearm and the hand
Muscles of the upper limbs
-hip and thigh muscles, leg muscles and foot
muscles
Muscles of the lower limbs
4 main physiological properties of the skeletal muscle tissue:
Excitability
Contractibility
Extensibility
Elasticity
- the ability to return to its normal shape after being extended.
Elasticity
- the ability to detect the neural stimuli (action potential);
Excitability
- the ability to contract in response to a neural stimulus;
Contractibility
- the ability of a muscle to be stretched without tearing;
Extensibility
2 major division of skeletal system
Axial appendicular
80 bones of the axial skeleton form the vertical axis of the body. They include the bones of
___, ____, _____, ____
the head, vertebral column, ribs and breastbone or sternum.
forms the vertical, central axis of the body and includes all bones of the head, neck, chest, and
back.
It serves to protect the brain, spinal cord, heart, and lungs.
for the attachment site for muscles that move the head, neck, and back,
and for muscles that act across the shoulder and hip joints to move their corresponding limbs
The Axial Skeleton
The skull is formed by __ bones. Also associated with the head are an additional seven bones
22
The vertebral column consists of __ bones, each called a vertebra, plus the sacrum and coccyx.
24
includes all bones of the
upper and lower limbs, plus the bones that attach each
limb to the axial skeleton.
The Appendicular Skeleton
There are __ bones in the appendicular skeleton of an adult. The bones of the appendicular skeleton are covered in a separate chapter.
Bones: Bones of all shapes and sizes support the body,
protect organs and tissues, store calcium and fat and
produce blood cells
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