Movement: Our body"s skeleton gives sufficient rigidity to our body that skeletal muscles can yank and pull on it, resulting in body activities such together walking, chewing, running, lifting, manipulating objects v our hands, and also picking our noses. Maintenance that posture: without much aware control, our muscles create a consistent contractile pressure that enables us to maintain an erect or sit position, or posture.

You are watching: The only tissue in your body that is able to contract or shorten

Respiration: Our muscular system automatically drives movement of wait into and also out of ours body. Heat generation: Contraction that muscle tissue generates heat, i beg your pardon is important for maintenance of temperature homeostasis. Because that instance, if our main point body temperature falls, us shiver to generate more heat. Communication: Muscle tissue permits us come talk, gesture, write, and convey our emotionally state by law such things as laugh or frowning. Constriction that organs and also blood vessels: Nutrients relocate through our digestive tract, urine is passed the end of the body, and also secretions are pushed out of glands by convulsion of smooth muscle. Constriction or relaxation of blood vessels regulates blood pressure and also blood circulation throughout the body. Pumping blood: Blood moves with the blood vessels because our heart tirelessly obtain blood and also delivers that to every body tissues and organs. This isn"t a finish list. Amongst the many possible examples space the facts the muscles aid protect breakable internal guts by enclosing them, and are also vital in preserving the truth of body cavities. Because that example, fetuses with incompletely formed diaphragms have abdominal yellowcomic.coms herniate (protrude) up right into the thoracic cavity, i beg your pardon inhibits typical lung growth and development. Even though this is one incomplete list, an evaluation of some of these simple muscle attributes will help you as we proceed.

Properties the muscle tissue

All muscle cell share number of properties: contractility, excitability, extensibility, and elasticity:

Contractility is the ability of muscle cells to forcefully shorten. For instance, in order to flex (decrease the angle of a joint) her elbow you need to contract (shorten) the biceps brachii and also other elbow flexor muscles in the anterior arm. An alert that in order to extend her elbow, the posterior eight extensor muscles should contract. Thus, muscles can only pull, never push.

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Excitability is the capability to respond to a stimulus, which may be ceded from a motor neuron or a hormone. Extensibility is the capacity of a muscle to it is in stretched. For instance, let"s reconsider our elbow flexing motion we questioned earlier. In bespeak to have the ability to flex the elbow, the elbow extensor muscles must extend in order to enable flexion come occur. Lack of extensibility is recognized as spasticity. Elasticity is the capacity to recoil or bounce back to the muscle"s original length after gift stretched. **You might use the buttons listed below to walk to the next or previous reading in this Module**
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