How the Body Works : Control of Involuntary Muscle

Control of Involuntary Muscle

Cardiac muscle and smooth muscle function involuntarily-beyond our conscious control. There is smooth muscle in organs of the digestive, respiratory, circulatory and urinogenital systems, while cardiac muscle is found exclusively in the heart. These muscles are controlled by the autonomic nervous system, which is composed of two opposing divisions, the sympathetic, shown in red, and the parasympathetic, shown in blue. Sympathetic nerves leaving the spinal cord lead first to nearby nerve chains before connecting the body organs, where they stimulate muscle activity. In the parasympathetic division, nerves pass from the spinal cord directly to the organs and have the opposite effect-decreasing muscle activity. This dual mechanism provides a method for maintaining the activity of the muscles within controlled limits. The sympathetic system is dominant in situations requiring rapid action. When, for example, danger threatens there is an increase in heart rate, respiration rate, blood pressure and sweat gland activity. The parasympathetic system is dominant while the body is resting-usually during sleep, when the heart rate is slower and respiration is deeper and more regular.

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Howto & Style

Tags:

• Control
• of
• Involuntary
• Muscle

[fancifelle]

My mom has Multiple System Atrophy which affects all of these things. Wish there was a cure.

[EssiacHempLaetrile]

CANCER CURE = RICK SIMPSON'S HEMP OIL

[Super2pou]

thanks dis really helped me alot!



[dubmdub]

Hey i never thought about voluntarily telling my body to not contract as much as i do tell it to contract. I'm gonna try that out. "Every 20 sec's I'll be grabbing my... (Afro Man)"

[Rozza365]

screw u

[kristianlemar09]

rory i have more money

[clock424]

Who is the narrator?

[HaylzBabez]

u cant control involuntary muscle... its like the heart..u cant control how many beats u want it to do! it does it itself, not under ur concious control :)

[firstbornbirdman]

For those who suffer from irritable bowel syndrome is their any way to affect this part of the nervous system outside of drug. Appreciate any response.

[windandthunder]

r u retarded or somthing like that

lol u beter go to dokter n chk ur brain xD

ther is nothin lies here!!

[micaddicts]

Wait. Err, where'd you get that images?