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Cartilage is found in several other areas of the body, such as the nasal septum, external ear, eustachian tube, larynx, trachea, bronchi, and intervertebral disks.
身體許多部位都有軟骨，例如鼻中隔、耳郭、耳咽管、喉頭、氣管、支氣管以及椎間板。
One example of a synovial joint is the ball-and-socket joint, which is found at the shoulder and hip.
滑液關節的一種為球窩關節，肩膀和臀部廣泛存在。
The ball rotating in the socket allows for a wide range of motion.
因球面在關節窩中旋轉，關節運動幅度增加。
Bands of strong connective tissue called ligaments bind bones together at the joint.
人們將帶狀結締組織稱之為韌帶，在關節處將骨骼連接在一起。
Some synovial joints contain a bursa，which is a sac-like structure composed of connective tissue and lined with synovial membrane.
許多滑液關節含有粘液囊，它是一種由結締組織構成的囊狀物質，周邊富含大量滑液膜。
They are most commonly found between bones and ligaments or tendons and function to reduce friction.
粘液囊在骨骼、韌帶以及跟腱之間廣泛存在，起到減少摩擦的作用。
Some common bursa locations are the elbow, knee, and shoulder joints.
普遍存在于肘部、膝蓋以及肩膀關節處。
Not all joints are freely moving.
不是所有關節都能夠活動自如。
Fibrous joints allow almost no movement since the ends of the bones are joined by thick fibrous tissue, which may even fuse into solid bone.
因骨骼末端富含大量纖維組織，它甚至會融合成堅硬骨骼，所以纖維連結幾乎無活動性。
The sutures of the skull are an example of a fibrous joint.
頭蓋骨骨縫就是纖維連結。
Cartilaginous joints allow for slight movement but hold bones firmly in place by a solid piece of cartilage.
軟骨連接可輕微活動，但它是通過一塊堅硬的軟骨將骨骼連接在一起。
An example of this type of joint is the pubic symphysis, the point at which the left and right pubic bones meet in the front of the lower abdomen.
趾骨聯合為軟骨連接，左右跖骨在下腹前方相連。
SECTION II MUSCULAR SYSTEM
第二部分 肌肉系統
Muscles are bundles of parallel muscle tissue fibers.
肌肉是一捆平行的肌肉組織纖維。
As these fibers contract, they pull whatever they are attached to closer together.
當纖維收縮，肌肉附著骨骼將相互靠攏。
This may move two bones closer or make an opening narrower.
收縮或使兩處骨骼靠攏或形成張口。
A muscle contraction occurs when a message is transmitted from the brain through the nervous system to the muscles.
一旦大腦傳遞信號，信號將通過神經系統傳遞給肌肉，肌肉就會發生收縮。
The point at which a nerve contacts a muscle fiber is called the myoneural junction.
神經與肌肉纖維連接點叫作神經肌肉接頭。
譯文屬可可英語原創，未經允許，不得轉載。
