Voluntary Muscles: Central Nervous System

which we are allow to control by ourselves are called the voluntary muscles and the ones we

The somatic nervous system controls the contractions of skeletal muscles and is under voluntary control.

There are three main types of muscle tissue in the body: Skeletal muscle, smooth muscle and cardiac muscle. Firstly, skeletal muscle has a stripped appearance when it is examined under a microscope so it is sometimes known as striated/stripped muscle. Skeletal muscle is voluntary and this means that it is under conscious control. Secondly, there is smooth muscle which is an involuntary muscle that operates without any conscious control. This muscle is controlled by the nervous system. Smooth muscle can be found in the blood vessels and the walls of the digestive system and it helps to control digestion and blood pressure. Lastly, there is cardiac muscle which is located in in the wall of the heart. Cardiac muscle is involuntary and this means that it is not under conscious control. This is made up of a specialised type of tissue which is striated and it has its own blood supply. The contractions aid the pumping of blood through the blood vessels

Biceps Brachii - It's attachments are the coracoid process, supraglenoid tuberosity, and radial tuberosity. When it contracts it causes flexion and supination. It's located close to the endangerment site the antecubital. This area is known for housing chronic pain.

These muscle tissue cells specialised to contract and move parts of the body. It is also capable of responding to stimuli. There are three types of muscle in the body such as: skeletal, cardiac and smooth. Each muscle is created of muscle fibers that are capable of contracting and returning back to original state-relaxation. Contraction causes movement of the skeleton, soft tissue, blood or specific material. Skeletal muscle is attached to the bones of the skeleton. Some facial muscles are attached to the skin. They have direct control over them through nervous impulses from our brain sending messages to the muscle. Contractions can vary to produce fast, powerful movements. These muscles also have the ability to stretch and contract to return to original shape. Cardiac muscles are found in the chambers of the heart such as the atria and ventricles. It is under the control of the automatic nervous system; however, even without nervous input contractions can occur. It is completely different to all the other muscles. Smooth muscles are also known as involuntary due to our inability to control its movement. This muscle is usually found in the walls of hollow organs

In cardiac muscle, a single nucleus is located in the middle of each fibre. The brain tissue also has a nucleus which is located in the middle of cell body. The cardiac muscle and brain tissue don’t have the exact same function. The cardiac muscle and the brain tissue don’t work together because the cardiac muscle doesn’t takes any instructions from the brain tissue (Neurones). This means that the cardiac muscle contracts automatically.

10. two of the main types of muscle tissue correspond with muscles that are involuntary, they are cardiac muscle, which includes the heart. Smooth muscle, which is also involuntary, and includes the stomach, intestines, uterus, urethra, bladder, and blood vessels. The Skeletal muscles are voluntary, they’re attached to the bone and are used to affect skeletal movement.

The nervous system is responsible for muscle movement. The nervous system consists of central nervous system (CNS) and the peripheral nervous system (PNS). The CNS is constitute of the brain and the spinal cord, and PNS is a network of nerves that runs throughout the body. The brain sends electrical signals to the CNS, and they are disbursed the PNS to produce body movement (Acrobatiq, 2014). Then, these signals travel back from the PNS to CNS to coordinate the next course of action of the body (Acrobatiq, 2014). The motor cortex section in the cerebrum sends messages to the muscles to coordinate accurate movement. Also, its control balance posture during the exercise and movement. The muscles instructed by the impulses from the cerebrum move in the given direction. They relax and contract according to the message relayed by the motor neurons.

You have four chambers in your heart. Two atria in the upper half of the heart and two ventricles

These are only some examples the muscle system does. In the video, talked about the muscles cells that are also known as muscle fibers. Each muscle fiber is surrounded by an excitable membrane called a sarcolemma and bundles that receive signals from the nervous system that contact them creating force and motion; this produces almost all the movements. The skeletal muscles are connected to the somatic nervous system. This gives control to the person over their movements. In the video, “How your muscular system works,” it also went over the fast fibers and slow fibers. Fast fibers react very quickly, but it easily fatigues. On the other hand, slow fibers are slow to react and slow to fatigue. The video also mentioned the Autonomic Nervous System and that the cardiac muscle and smooth muscle. The Autonomic Nervous System contracts and relaxes the smooth muscle. For example, it pushes food through the digestive system. Also, The Autonomic Nervous System contains cardiac muscle that supplies the heart with blood and

Smooth muscles are found in the skin, internal organs, reproductive system, major blood vessels, and excretory system. Skeletal muscles are composed of long fibers surrounded by a membranous sheath, the sarcolemma. Since the Skeletal muscles are under control by whom ever they belong to are called voluntary muscles. This muscle is attached to two or more bones which are then attached to the skeleton by tendons. For example, head and neck muscles; contraction of these muscles produces facial expressions and head movements. They are also responsible for speech and swallowing. Skeletal muscles are the main muscles which move your body. Muscles nearly always work in coordinated groups; contraction of one muscle is accompanied by relaxation of another, while other muscles stabilize nearby joints. Then the last of the muscle types is the Cardiac Muscle or the involuntary muscles. Cardiac muscles are not under conscious control they do not react by a persons decision or movement. and are connected to the nervous system which are stimulated by autonomic impulses. Cardiac muscles are found in your internal organs like the heart or the intestine. For example; they include muscles that propel food through the intestine and those that control sweating and blood pressure.

There are three main types of muscles skeletal, cardiac, and smooth muscles. Most of them contract every time we move. Many muscles must contract to move the bone they are attached to or to provide resistance. In this essay I will talk about the different ways muscles contract.

The Heart is hollow organ which is composed of four muscular chambers the right and left atrium and ventricles that is specialized for pumping blood throughout the body. The heart is also consists of four valve; two atrioventricular valve which is the bicuspid and tricuspid valve that is allowing blood to flow in the atria and closes when there is a increase ventricular pressure that prevent backflow into the atria as ventricles contract (Craft, Gordon, and Tiziani, 2011), and the semilunar valves which include the pulmonary and aortic valves is located at the exit of the large arteries from the ventricles that opens when there is intraventricular pressure exceeded the aortic and pulmonary pressure which allows the blood flow into the systemic

Both of these muscles expand and contract as they have complex structures so it is essential how they do this. The cardiac muscle needs the contractions to occur in order to pump blood out of the atria and into the ventricles and round the circulatory system so the structure of this muscle shows the systole of the heart. The contractions of the skeletal muscle also depend on its structure. The binding and releasing of two strands of sarcomere is how the repeated pattern of contractions occurs. ATP is used to prepare myosin for binding to allow the contractions to happen. The skeletal and cardiac muscle also both has elasticity. The elasticity is used to restore the muscles back to their original lengths which enable them to resume back to their original length once they have contracted and been stretched.

While contraction in skeletal muscle is triggered by motor neurons under central control, certain cardiac muscle variants exhibit autorhythmicity. This means that that they are capable of producing their own depolarizing electrical potential. The cardiomyocytes that are capable of producing their own electrical potentials are found in what is referred to as the electrical condition system of the heart. This system is comprised of specializes cardiomyocytes that are autorhythmic and are able to conduct electrical potentials rapidly. These specialized structures include the sinoatrial node, atrioventricular node and bundle, and Purkinje fibers.