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muscle spindles
the ESOPHAGUS is a tube in the throat which food goes down when you swallow. (swallowing is mostly involuntary because the esophagus is made of smooth muscle, a type of muscle that works without control of the brain.) The food goes down into the stomach. On the top half of the esophagus is a sphincter, as well as on the bottom half. they help close off the esophagus.
A Fast Oxidative Fiber is a type of muscle fiber with many mitochondria and capillaries. This type has a high myoglobin content. This type of muscle tires more quickly than the slow oxidative fibers and is an intermediate sized muscle. This muscle is good for sprinting and other short, fast-paced activities.
smooth muscles in the wall of the esophagus.
A deltoid muscle is the muscle that forms the rounded part of the shoulder.
Cardiac (heart)
smooth
all or none
type 2a type 2a
Smooth muscles make up most of the esophagus, but the upper portion also contains some voluntary or skeletal muscle. The muscles move in a wave like pattern to move food down into the stomach through a process called "peristalsis". At the distal end is the lower esophageal sphincter, a ring of smooth muscle that controls movement of food between the stomach and esophagus.
because due to the fact that food is swallowed and transported to the stomach through the esophagus it must be flexible when food goes through and when you swallow, because everything varies in size.
The nutrient that is not digested but stimulates intestinal muscle contractions is fiber. Fiber is a type of carbohydrate that may be soluble or insoluble.