Anatomy is a great science
The six major types of synovial joints are classified according to the shape of the articulating surfaces and/or the type of movement they permit: Synovial joints are classified according to the shape of their articulating surfaces and/or the type of movement they permit. 1. Plane joints permit gliding or sliding movements in the plane of the articular […]
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The bones of the calvaria (skullcap) of a newborn infant’s cranium do not make full contact with each other. At these sites, the sutures form wide areas of fibrous tissue called fontanelles . The anterior fontanelle is the most prominent; laypeople call it the “soft spot.” The fontanelles in a newborn are often felt as ridges because of the […]
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Types of Muscle (Muscle Tissue) Muscle cells, often called muscle fibers because they are long and narrow when relaxed, are specialized contractile cells. They are organized into tissues that move body parts or temporarily alter the shape (reduce the circumference of all or part) of internal organs. Associated connective tissue conveys nerve fibers and capillaries to the […]
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The architecture and shape of a skeletal muscle depend on the arrangement of its fibers. Skeletal Muscles FORM, FEATURES, AND NAMING OF MUSCLES All skeletal muscles, commonly referred to simply as “muscles,” have fleshy, reddish, contractile portions (one or more heads or bellies) composed of skeletal striated muscle. Some muscles are fleshy throughout, but most […]
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Most of the muscles shown move the skeleton for locomotion, but some muscles—especially those of the head—move other structures (e.g., the eyeballs, scalp, eyelids, skin of face, and tongue). The sheath of the left rectus abdominis, formed by aponeuroses of the flat abdominal muscles, has been removed to reveal the muscle. Retinacula are deep fascial […]
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