动物骨架介绍英文作文
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动物骨架介绍英文作文
英文:
Animal skeletons are fascinating structures that
provide support, protection, and movement for the body.
They are made up of bones, which are connected by joints
and held together by ligaments and tendons. The skeleton is divided into two main parts: the axial skeleton, which includes the skull, spine, and ribcage, and the
appendicular skeleton, which includes the limbs and their supporting structures.
The axial skeleton is responsible for protecting the brain, spinal cord, and vital organs such as the heart and lungs. The skull is made up of several bones that fit together to form a protective casing for the brain. The spine, or vertebral column, is made up of individual vertebrae that provide support and flexibility for the body. The ribcage is made up of the sternum and ribs, which
protect the heart and lungs.
The appendicular skeleton is responsible for movement and support of the limbs. The upper limbs consist of the shoulder girdle, which includes the clavicle and scapula, and the arm bones, which include the humerus, radius, and ulna. The lower limbs consist of the pelvic girdle, which includes the hip bones, and the leg bones, which include the femur, tibia, and fibula.
Animal skeletons can vary greatly in size and shape depending on the species and their needs. For example, bird skeletons are lightweight and have hollow bones to aid in flight, while elephant skeletons are massive and sturdy to support their weight.
中文:
动物骨架是一种迷人的结构,为身体提供支撑、保护和运动。
它们由骨头组成,通过关节连接在一起,并由韧带和肌腱保持在一起。
骨架分为两个主要部分,轴骨骼,包括头骨、脊柱和肋骨,以及附肢骨骼,包括四肢和它们的支撑结构。
轴骨骼负责保护大脑、脊髓和重要器官,如心脏和肺部。
头骨由几个骨头组成,拼合在一起形成一个保护性外壳,保护大脑。
脊柱或椎骨柱由单独的椎骨组成,为身体提供支撑和灵活性。
肋骨由胸骨和肋骨组成,保护心脏和肺部。
附肢骨骼负责四肢的运动和支撑。
上肢由肩带组成,包括锁骨和肩胛骨,以及手臂骨,包括肱骨、桡骨和尺骨。
下肢由骨盆带组成,包括髋骨,以及腿骨,包括股骨、胫骨和腓骨。
动物骨架的大小和形状因物种和其需求而异。
例如,鸟类骨架轻盈,骨骼中空有助于飞行,而大象骨架巨大坚固,以支撑它们的体重。