Muscular System
The largest percentage of muscles in the muscular system.
What is the skeletal muscle?
When these muscles contract, they move the body.
What are Skeletal muscles?
Is found only in the walls of the heart.
What is Cardiac muscle tissue?
Are attached to the bones of the skeleton.
What is skeletal muscle?
Is the muscle that performs the greatest amount of physical work in a lifetime.
What is the heart?
the muscular system includes
What are skeletal, cardiac, and smooth muscles?
Skeletal muscles are attached to the skeleton by tough connective tissues called __________.
What are tendons?
Muscles can also grow smaller, this is called _______.
What is atrophy?
When they contract, they help the organs and vessels carry out their functions.
What are smooth muscles?
What are muscle cells called?
Muscle fibers
Are responsible for virtually all the movements of the body, both inside and out.
What are Muscle contractions?
Muscles can grow larger, this is called __________.
What is hypertrophy?
Contractions of skeletal muscles are __________ or under the conscious control of the central nervous system via the somatic nervous system.
What is voluntary?
The cardiac muscle contains many ___________, which produce ATP for energy and help the heart resist fatigue.
What are mitochondria?
Contractions of smooth muscles are _________, so they are not under conscious control.
What is involuntary?
Muscles cannot move the body on their own. They need the skeletal system to act upon. The two systems together are often referred to as ____________
What is the musculoskeletal system?
Involuntary contractions of smooth and cardiac muscles are controlled by electrical impulses, but in the case of these muscles, the impulses come from the _________ (smooth muscle) or ____________ (cardiac muscle).
What is autonomic nervous system, and specialized cells in the heart?
Is the most common type of muscle tissue in the human body.
What is Skeletal muscle tissue?
The only organ that is not directly dependent upon the nervous system is the _________.
What is the cardiac muscle?
Cardiac muscle is found only in the wall of the heart. It is also called ____________.
What is myocardium?
Relaxation of these muscles causes vasodilation, which may help the body lose heat.
What are Smooth muscles?
In the organs of the digestive system, smooth muscles squeeze food through the gastrointestinal tract by contracting in sequence to form a wave of muscle contractions called _______.
What is peristalsis?
As people grow older, there is a gradual decrease in the ability to maintain skeletal muscle mass, known as __________________.
What is sarcopenia?
Is intrinsically connected to the muscular system of the body. It is essential to the voluntary skeletal muscle.
What is the nervous system?
They are controlled by the autonomic nervous system, hormones, neurotransmitters, and other physiological factors.
What are contractions of smooth muscles?