Bursa - Synovial fluid

Japanese: 滑液包 - かつえきほう
Bursa - Synovial fluid

…Therefore, in general, spindle muscles have a wide range of motion, while pennate muscles have a larger number of muscle fibers, and therefore are characterized by stronger contraction than range of motion (Figure 3). Where the inner surface of the muscle contacts the joint capsule, a synovial bursa is present to reduce friction during movement. A bursa is a cavity surrounded by two membranes, an outer fibrous membrane and an inner synovial membrane, and contains synovial fluid secreted from the synovial membrane. …

*Some of the terminology that mentions "bursa" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…したがって一般的には,紡錘状の筋肉は運動範囲が広く,羽状筋はそれに含まれる筋繊維の数が多いので,運動範囲よりも収縮の強いことが特徴である(図3)。 筋肉の内面が関節包と接するところでは,運動時の摩擦の軽減のために,滑液包synovial bursaが介在している。滑液包というのは,外側の繊維膜と内側の滑膜の2枚の膜によって包まれた腔所で,内部には滑膜より分泌された滑液が含まれている。…

※「滑液包」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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