Palace Learning Muscular System Anatomical Poster - LAMINATED - Muscle Anatomy Chart - Double Sided (18 x 27)

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The lateral head originates from the lateral surface of the lateral condyle and the lower part of the supracondylar line. Rhabdomyolysis: This life-threatening condition causes a breakdown of muscle tissue. The damaged muscles release proteins, electrolytes and other substances into the blood. This can lead to serious organ damage. Traumatic injuries, heatstroke or severe overexertion can cause rhabdomyolysis. There are three classes of levers, but the vast majority of the levers in the body are third class levers. A third class lever is a system in which the fulcrum is at the end of the lever and the effort is between the fulcrum and the load at the other end of the lever. The third class levers in the body serve to increase the distance moved by the load compared to the distance that the muscle contracts.

Depending on the type, the primary function of muscle is to move the bones of the skeleton. However, muscles also enable the heart to beat and can be found in the walls of hollow organs, such as the intestines, uterus and stomach. At its most basic level, muscle tissue is classified as either striated or non-striated/smooth based on the presence or absence of ‘striations’ (i.e. stripes/furrows) seen at a microscopic level; these are formed due to a particular arrangement of actin and myosin filaments within the myocyte (discussed below). Striated muscle can be further subdivided into three classifications based on its location and morphology: The liver partners with the gallbladder to deliver bile to the small intestine. The liver pours bile into the gallbladder, which then stores and later releases the bile when the body needs it to help with digestion.

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Fallopian tubes: The fallopian tubes connect the ovaries to the uterus on each side. Hairlike structures called cilia guide the egg from the ovary to the uterus. The liver is the most important organ of the metabolic system. It helps convert nutrients into usable substances, detoxifies certain substances, and filters blood coming from the digestive tract through a vein before it joins venous blood flow from other parts of the body. Oxygenated blood reaches the liver via an artery. Shape, Size, and Direction. We also classify muscles by their shapes. For example, the deltoids have a delta or triangular shape. The serratus muscles feature a serrated or saw-like shape. The rhomboid major is a rhombus or diamond shape. The size of the muscle can be used to distinguish between two muscles found in the same region. The gluteal region contains three muscles differentiated by size—the gluteus maximus (large), gluteus medius (medium), and gluteus minimus (smallest). Finally, the direction in which the muscle fibers run can be used to identify a muscle. In the abdominal region, there are several sets of wide, flat muscles. The muscles whose fibers run straight up and down are the rectus abdominis, the ones running transversely (left to right) are the transverse abdominis, and the ones running at an angle are the obliques. The heart has four valves that ensure that blood flows in the right direction. The heart valves are:

Many muscles are attached to bones at either end via tendons. The muscle origin often describes the more proximal attachment point of the muscle, while the muscle insertion point refers to the distal attachment. In our cheat sheets, you’ll find the origin(s) and insertion(s) of every muscle. Finally, a reliable source (and good looking too!). Muscle innervation

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The skeletal muscles are the main functional units of the muscular system. There are more than 600 muscles in the human body. They vary greatly in shape in size, with the smallest one being the stapedius muscle in the inner ear, and the largest one being the quadriceps femoris muscle in the thigh. The tibialis anterior is a fusiform muscle that originates from the lateral surface of the tibial condyle and the superior two-thirds of the proximal shaft of tibia. It courses inferiorly down the leg until it reaches the distal third of the tibia, where it extends into a cord-like tendon. The tendon continues across the ankle and dorsum of the foot to insert into the medial cuneiform bone and the base of the first metatarsal bone of the foot. Lee M, Dalpiaz A, Schwamb R, Miao Y, Waltzer W, Khan A. Clinical pathology of Bartholin’s glands: A review of the literature. Curr Urol. 2015;8(1):22-25. doi:10.1159/000365683

Muscles of the lower extremity below the knee joint that mainly produce movements of the foot at the ankle joint In this article, we will explore the many functions of muscle in the human body as well as its basic structure, types and classifications. The left and right bronchi: The trachea splits into these tubes, which extend into the lungs and have branches. These smaller bronchi split into even smaller tubes called bronchioles.

In addition to the agonist/antagonist pairing, other muscles work to support the movements of the agonist. Synergists are muscles that help to stabilize a movement and reduce extraneous movements. They are usually found in regions near the agonist and often connect to the same bones. Because skeletal muscles move the insertion closer to the immobile origin, fixator muscles assist in movement by holding the origin stable. If you lift something heavy with your arms, fixators in the trunk region hold your body upright and immobile so that you maintain your balance while lifting. Skeletal Muscle Histology This article will introduce you to the anatomy and function of the leg muscles. Key facts about the leg muscles Definition

Muscles of the upper limbs, which include muscles of the shoulder, muscles of the arm, muscles of the forearm and muscles of the hand Structure of a sarcomere: Colorado Community College System, https://pressbooks.ccconline.o..., CC4)Due to its structural integrity, the skeletal system protects the internal organs, most importantly the brain, which is surrounded by the skull, as well as the heart and lungs, which are protected by the rib cage. Sarcopenia: We gradually lose skeletal muscle mass as we age. Sarcopenia begins around age 40. By 80, we lose about 50% of our muscle mass. Sarcopenia can lead to loss of function, mobility, balance problems and falls. Obesity, hormonal changes and other health conditions can accelerate muscle loss. The main function of the fibularis tertius is a weak dorsiflexion of the foot at the ankle, that complements the actions of the tibialis anterior and extensor digitorum longus. The fibularis tertius can also act on the subtalar joint assisting the fibularis longus and fibularis brevis in the eversion of the foot.