what are muscles?
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- Muscles are specialised cells that have the capacity to contract and relax. They tend to be arranged in layers so that they are working together in concert in order to apply a force to move something, eg a joint.
- There are muscles in all sorts of surprising places on a human body. You have muscles in your eyes, and yet you never see gym-goers doing an eye-session, do you. Hmm.
- The human face is covered (under the skin) by a hugely complex arrangement of muscles, which allows to be the most facially expressive of pretty much any animal -- certainly the most expressive of the primates.
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Muscle mass :
Muscle mass is the weight of muscle in your body. Muscle mass percentage is actually composed of your muscle, bone tissue, and the water in your body and organs. Calculating your muscle mass percentage determines how much of your total body weight is lean mass versus how much is body fat.
You have more than 600 muscles in your body. Some muscles help you move, lift or sit still. Others help you digest food, breathe or see. Your heart is a muscle that pumps blood through your body. Many injuries and diseases can affect how the muscles work. To keep your muscles strong, maintain a healthy weight, eat right and exercise regularly.Many disorders, injuries and diseases can affect how muscles work. These conditions can cause muscle pain, muscle spasms or muscle weakness. More severe disorders can lead to paralysis. Cardiomyopathy and other kinds of heart disease make it difficult for the heart to pump blood through the body.
Living a healthy lifestyle helps your muscles work like they should. You can keep your muscles strong by maintaining a healthy weight, eating a balanced diet and getting plenty of exercise. Be sure to see your provider regularly to screen for diseases and conditions that can lead to muscle problems.You control some muscles voluntarily with the help of your nervous system (your body’s command center). You make them move by thinking about moving them.
Other muscles work involuntarily, which means you can’t control them. They do their job automatically. In order to work, they take cues from other body systems, such as your digestive system or cardiovascular system.
Skeletal: As part of the musculoskeletal system, these muscles work with your bones, tendons and ligaments. Tendons attach skeletal muscles to bones all over your body. Together, they support the weight of your body and help you move. You control these voluntary muscles. Some muscle fibers contract quickly and use short bursts of energy (fast-twitch muscles). Others move slowly, such as your back muscles that help with posture.
Cardiac: These muscles line the heart walls. They help your heart pump blood that travels through your cardiovascular system. You don’t control cardiac muscles. Your heart tells them when to contract.
Smooth: These muscles line the insides of organs such as the bladder, stomach and intestines. Smooth muscles play an important role in many body systems, including the female reproductive system, male reproductive system, urinary system and respiratory system. These types of muscles work without you having to think about them. They do essential jobs like move waste through your intestines and help your lungs expand when you breathe.
Muscles play a role in nearly every system and function of the body. Different kinds of muscles help with:
Breathing, speaking and swallowing.
Digesting food and getting rid of waste.
Moving, sitting still and standing up straight.
Pumping blood through the heart and blood vessels.
Pushing a baby through the birth canal as muscles in the uterus contract and relax.
Seeing and hearing.