Muscles Of The Body Flashcards, test questions and answers

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What is Muscles Of The Body?

The human body is an amazing machine composed of a complex network of interconnected systems. Muscles are one of the most important components of this system, as they provide us with movement and the ability to interact with our environment. Muscles can be classified into three main types: skeletal, smooth and cardiac. Each type has its own unique structure and function that helps keep us healthy and able to move around in our daily lives. Skeletal muscles are the largest type of muscle found in the body, accounting for approximately 40% of body weight. They attach directly to bones via tendons, allowing them to produce force when contracting or shortening their length. Skeletal muscles work together with other muscles to produce movement by causing bones to move in different directions or at varying speeds. Examples of skeletal muscles include those used for walking, jumping, lifting and carrying objects. Smooth muscles line the walls of organs such as the stomach and bladder, helping these organs perform their specific functions by contracting or relaxing when needed. Smooth muscle contractions are not under conscious control like those of skeletal muscles; instead they react automatically based on stimuli from outside sources such as hormones or nerves in order to maintain homeostasis (balance) within the body’s systems. Examples include digestion, urination and childbirth processes that rely on smooth muscle contractions for proper functioning. Finally, cardiac muscle makes up about 30% of total body weight; it is only found in cardiac tissue (heart). Like smooth muscle cells it does not rely on conscious control but rather works automatically through electrical impulses sent from specialized cells known as pacemakers which regulate contraction frequency throughout all parts of the heart chamber walls. This allows blood flow throughout the entire circulatory system while also maintaining a steady heartbeat during restful states as well as when we exercise vigorously or experience emotional stressors such as fear or excitement.