MUSCULAR SYSTEM ORGANS
Published on Mar 28, 2016
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PRESENTATION OUTLINE
The Muscular System
The muscular system permits movement and locomotion in animals. There are two types of muscles, voluntary and involuntary. The organs are cardiac, skeletal, and smooth muscle cells.
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Muscular System Organs
Cardiac Muscle Cells
The cardiac muscle cells contracts itself so that the heart keeps pumping, sending out blood. It is located in the heart. Cardiac muscles have a branched shape so that each cell is in contact with three or four other cardiac muscle cells. Cardiac muscle cells also function to exchange ions such as sodium, potassium and calcium, which regulate the strength and duration of the contractions.
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Skeletal Muscle Cells
The skeletal muscle cells produce movement, maintain posture and generate body heat. They also function to convert glucose into ATP (energy). Some skeletal muscle cells only contract when simulated by the nervous system. Others allows the skeletal muscle cell to perform voluntary movement.
Photo by Phil Roeder
Smooth Muscle Cells
The smooth muscle cells function to contract, but the nervous system controls the contractions. This means that the smooth muscle cells move involuntarily. Smooth muscle controls slow, involuntary movements such as the contraction of the smooth muscle cells in the walls of the stomach and intestines. Smooth muscle cells function to maintain organ dimensions and regulate the diameter of the arteries. The muscle of the arteries contracts and relaxes to regulate the blood pressure and the flow of blood.
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Interacting Organs
The muscular system interacts with the digestive system organs in several places. The muscles of the jaw chew the food, and then muscles along the esophagus move the food from the mouth to the stomach. Muscles along the intestines move digesting food along. So, the muscular system is very helpful when the digestive system process occurs.
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