what is the difference between longitudinal muscles and circular muscles?
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The motion of the mucosal surface originates in circular muscle contraction moving the mucosal surface radially (transverse to the lumen), and in longitudinal muscle contraction moving the surface axially (along the lumen).
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The lower muscle fibers of the internal obliques run nearly horizontally. Along with the external obliques, the internal obliques are involved in flexing the spinal column, sideways bending, trunk rotation, and compressing the abdomen.
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The main difference between these types of motion is that circular motion is a special case of rotational motion, where the distance between the body's centre of mass and the axis of rotation remains fixed. Rotational motion is based around the idea of rotation of a body about its center of mass.
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Most of your muscles are made up of a mixture of both slow and fast twitch muscle fibres. But, your soleus muscle in your lower leg and muscles in your back involved in maintaining posture contain mainly slow twitch muscle fibres. And muscles that move your eyes are made up of fast twitch muscle fibres.
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These two muscles that overlap are supposed to glide over each other with distinction. Pectoralis minor moves from the back to the front of the body while pectoralis major moves from the outside to the inside in the front plane of the body.
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transversus. Axial muscles position the head and spinal column and also move the rib cage for breathing.
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A circular needle will hold the stitches a little better and make it easier on your body because the needle holds more of the weight of the project. Knitting flat on circular needles is the same as working on straight needles. Do not join in the round, just cast on and knit.
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Muscles that are under your conscious control are called voluntary muscles, while muscles that are not under your conscious control are called involuntary muscles.
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Origin and insertion The rectus abdominis muscle is composed of a pair of vertically oriented muscles. ... The medial head originates from the pubic symphysis, interlacing with the fibres of the muscle on the contralateral side. It inserts onto the xiphoid process of the sternum and onto the costal cartilages of ribs 5-7.
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"concentric" is the lifting (contracting) phase of an exercise - "eccentric" is lowering. Briefly, in negative/eccentric training - a weight is raised by partners or another limb and lowered slowly (4-10 count) by the working muscle. Up to 40% more weight can be lowered than raised.
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While skeletal muscles are arranged in regular, parallel bundles, cardiac muscle connects at branching, irregular angles, called intercalated discs. Striated muscle contracts and relaxes in short, intense bursts, whereas smooth muscle sustains longer or even near-permanent contractions.
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Figure 1: Muscle Types. Cardiac and skeletal muscle are both striated in appearance, while smooth muscle is not. Both cardiac and smooth muscle are involuntary while skeletal muscle is voluntary.
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The main difference between your core and your abs (or rectus abdominal muscles), is that the core covers all the muscles in the abdominal area that are responsible for functional strength and stabilising. ... This group of muscles generally controls strength and range of movement, and helps you with stability.
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Rotation is always when a body moves on its own axis . Circular when the body moves around some other body. Rotatory motion is when a body spins around its centre of gravity or its own axis. Circular motion is due to centripetal force, while rotatory motion involves torque .
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The heart muscles are otherwise called as cardiac muscles. The muscles at limbs are called as skeletal muscles. ... The limb muscle is “non-striated”, whereas the cardiac muscles are striated and have high rate of contraction.
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Postural muscles act predominantly to sustain your posture in the gravity field. These muscles contain mostly slow-twitch muscle fibres and have a greater capacity for sustained work. They are prone to hyperactivity. Phasic muscles contain mostly fast-twitch muscle fibres, and are therefore more suited to movement.
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Smooth muscle has neither a transverse (T)-tubule system, plasma membrane infoldings characteristic of striated muscle, nor a well-developed sarcoplasmic reticulum. ... Whereas they contract more slowly than skeletal muscle, smooth myocytes can remain contracted for longer periods of time.