Skin Ligaments In Subcutaneous Tissue
Skin Ligaments In Subcutaneous Tissue

Skin ligaments (L. retinacula cutis ), numerous small fibrous bands, extend through the subcutaneous tissue and attach the deep surface of the dermis to the underlying deep fascia. The length and density of these ligaments determines the mobility of the skin over deep structures. Where skin ligaments are longer and sparse, the skin is more mobile, such as […]

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Synovial Tendon Sheaths And Bursal Sacs
Synovial Tendon Sheaths And Bursal Sacs

Synovial tendon sheaths and bursal sacs. A. Synovial tendon sheaths are longitudinal bursae that surround tendons as they pass deep to retinacula or through fibrous digital sheaths. B. Bursal sacs enclose several structures, such as the heart, lungs, abdominal viscera, and tendons, much like this collapsed balloon encloses the fist. A thin film of lubricating fluid between […]

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Three Classes Of Joint
Three Classes Of Joint

Examples of each class are shown. Two models demonstrating basic features of a synovial joint are included in (A)   Joints Joints (articulations) are unions or junctions between two or more bones or rigid parts of the skeleton. Joints exhibit a variety of forms and functions. Some joints have no movement, such as the epiphysial plates between […]

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The Six Types Of Synovial Joints
The Six Types Of Synovial Joints

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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Joints Of Newborn Cranium
Joints Of Newborn Cranium

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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