Three Types of Muscles Found in the Human Body
• Skeletal (muscles that move voluntarily)
• Smooth (involuntary muscles in organs)
• Cardiac (only found in the heart)
The Function of Muscles
- To help us move and maintain posture.
- Create heat (the calories burned for energy tend to have an output of 75% heat, therefore on a cold day running is an effective way to warm up).
- Regulate organs.
- Move substances around the body (blood from the heart and food through the digestive system.
• Are directly attached to the skeleton by tendons.
• Aid in movement and locomotion.
• Are voluntarily activated.
• Appear striped under a microscope. Also called "striated" muscle.
• Fatigue more quickly than smooth or cardiac muscles.
• Are able to stretch and resume original shape.
• Striated appearance comes from formation of actin and myosin muscle fibres.
• Are capable of powerful contractions and, just as adequately, small contractions for delicate movement requiring precision.
• Stimulated by the nervous system's motor neurons.
• Well-supplied with nerves and blood vessels.
• Get their name from their smooth appearance under a microscope.
• Arranged in bundles of muscle fibre sheets.
• Contract involuntarily. Regulated by autonomic part of nervous system.
• Found in walls of hollow structures, including veins, arteries, and intestines.
• Maintain flow of fluid and food along hollow structures.
• Found in hair erectors, pupils, gland ducts, esophagus, bronchi, intestines, stomach, and blood vessels.
• Contract slowly and rhythmically.
• Fatigue slowly.
• Found only in heart and at cardiac ends of main blood vessels.
• Contract involuntarily.
• Striated when viewed under a microscope.
• Do not fatigue.
• Contract rhythmically.
• Controlled by central nervous system, but can contract without signals due to "pacemaker" cells.
• Contain high count of mitochondria and myoglobin.
• Have good blood supply.
Skeletal muscle tissue fatigues much more quickly than cardiac or smooth muscles, perhaps because skeletal movement is not essential to homeostasis and survival. It is theoretically quite possible to survive without having to use some skeletal muscles at all. At the opposite extreme, cardiac muscle tissue is under permanent tension to lesser or greater extents to deliver blood, other fluids, oxygen, nutrients, and other substances vital to survival.
Cardiac muscles have great blood supply and are designed specifically to avoid becoming fatigued. Since asphyxiation can lead to death within minutes, cardiac muscles must be able to fulfill their duty transporting oxygen in blood hemoglobin. Cardiac muscle mitochondria help with energy production rhythmic capacity, even at high force when needed.
Research has shown that skeletal muscle mass grows in correlation to the force exerted. These muscles are bigger than smooth and cardiac muscles as a result.
Conscious or Subconscious Contraction
(also known as voluntary or involuntary contraction)
Cardiac and smooth muscles operate on a subconscious, or involuntary, basis. Given the frequency of contractions this is just as well. Not only would it be nearly impossible to make a conscious decision to activate our heart and smooth muscles, but the responsibility would be too much. It is important that the heart maintains a rhythm. A heartbeat that is too fast would lead to high blood pressure. Too slow, and low blood pressure would result, resulting in low energy.
Only skeletal muscles require voluntary contraction, although sometimes movement can be a reflex action (i.e. hitting the patella region with a rubber hammer can cause flexion of the knee). Generally it must be a voluntary action, or else we would have no control over the locomotion of our body to do everyday tasks.
Read More From Owlcation
Student on August 29, 2020:
I think the differences if tabulated would be very good and preferable
UKNOWN on February 25, 2020:
Frank on February 25, 2020:
vinny osoro on December 03, 2019:
Tajuddeen usman ma'aruf on October 28, 2019:
may Allah give us success in our life
tilk on October 14, 2019:
not have any sense at all
Ahmed on September 30, 2019:
Thnks very much
james e on September 23, 2019:
nice and summarised
faith on September 16, 2019:
very good and so explained
Ismasha on August 25, 2019:
I fully appreciates this post ,
cookie meh on July 31, 2019:
thx for the advice
Aaron on June 07, 2019:
This has really helped me doing my hmwrk
Portia on May 26, 2019:
Thank you l have benefited greatly
shivangi jagat on April 01, 2019:
it is very helpful_thanks
JULIA on March 07, 2019:
very helpful, thanks
amorich on December 27, 2018:
its good, more understandable
Alaa kareem on December 06, 2018:
I have benefited greatly from this report. Thank you for your dedication
pal on December 05, 2018:
very good thank you
Elibariki on November 23, 2018:
It is good,differ constrast absence,for picture excellence bt need evedence for more help.
austin on November 06, 2018:
lily on October 15, 2018:
not helpful at all
Tejal thokar on October 09, 2018:
It is very misleading please make a table or a list
Sierra McCall on October 08, 2018:
It is very misleading. It does not provide the information the title suggests. A table or list of some sort would have been more helpful.
Ibrahim on October 05, 2018:
JRX on August 19, 2018:
thanks for the picture
appreciate it very much!!
firstname.lastname@example.org on July 17, 2018:
what is the reference of this material
Aleduemmyc@gmail on July 12, 2018:
Princetongirl248 on July 03, 2018:
thanks a lot it is such a informative. .......its good to know what and what comes together and make a science
person on June 04, 2018:
Add a table
Aayush on May 25, 2018:
Please insert a table for the differences and similarities
Anonymous on May 23, 2018:
No help what so ever
anonymous on May 22, 2018:
NOT HELPFUL AT ALL
kiba on May 18, 2018:
I need help
pooperdoober on May 18, 2018:
i hate u and do drugs
kiba on May 17, 2018:
i do drugs
Billy Bob on February 27, 2018:
very helpful thanks! :)
Don on February 22, 2018:
Please make a table
Sumit on February 08, 2018:
Thnx a lot
Student on January 06, 2018:
Thank you so much! this helped a lot!
Selwa Berhanu on January 04, 2018:
Short but very usefull thank you very much
Now i have something to say for my presentation
sejal on December 26, 2017:
thanks a lot it is such a informative
Lol on December 09, 2017:
Can u also make a table to compare the differences and similarities? That will be extremely helpful thanks:)
mlg snoop dogg god on December 04, 2017:
i like drugs
James Boyan on December 01, 2017:
Thanks a lot I benefit from this, it helped me do my research.
AMINU NURUDEEN on October 12, 2017:
THIS IS AN EXCELLENT WRITING, I LOVE IT.
cara on September 23, 2017:
what are the similarities of the three major muscles?
maman humayra on September 11, 2017:
its good to know what and what comes together and make a science
Lucy Leland on September 09, 2017:
fancy on September 04, 2017:
It is very useful for me
student on August 30, 2017:
thank you so much this is very helpful thanks
diyana on August 14, 2017:
It Is very helpfully to me
And I am very thankfully
Sonu on July 21, 2017:
It helped me alot ........ thanks.....
Student on July 17, 2017:
Medical Biller on June 18, 2017:
Lameck c sinyangwe on March 16, 2017:
Thanx for this answers
Jordan Vesota on February 04, 2017:
Thanks for trying your best
UNKNOWN on January 25, 2017:
Thx so much its information that I can use
Ahmet Somali on January 11, 2017:
Michael on November 23, 2016:
This really helped with my research project : D
S on November 20, 2016:
Struggling student on November 19, 2016:
Very, very,very helpful...:)
Sky on November 18, 2016:
Thanks! This helped me on an essay I had to do research on.
A on November 16, 2016:
this is great thanks
Talal on October 24, 2016:
Thx so much
unknown on October 12, 2016:
THANKS SOOO MUCH I HAD A QUIZ ON IT!!! THANKS AGAIN!
tttggh on October 10, 2016:
thanks its so good...... yo got it dude
Christine on September 06, 2016:
Thank you so much for this answer
sabrina on June 03, 2015:
thanks......it is informative
Just a student in need. on April 24, 2013:
Thank you so much.. I needed this. It helped alot!