Предмет: Геометрия, автор: tsaruk07

два зоввнішні кути трикутника 104 і 124 градуса Знайдіть кути трикутника

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Автор ответа: Nastya200703

Ответ:24°,39° і 95°

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1. Is the skeleton is composed of bones?

2 How many bones are there in the skeleton of an adult person?

3 what parts does the skull consist of?

4 what parts does spine consist of?

5 what parts does the chest consist of?

6 what bones do uppex and low extremities consist of ?

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THE SKELETON.

The skeleton is composed of bones. In the adult the skeleton has over 200 bones.

The bones of the skull consist of cranial and facial parts. There are 26 bones in the skull.

The bones of the trunk are the spinal column or the spine and the chest (ribs and breastbone). The spine consists of the cervical, thoracic, lumbar and sacral vertebrae and the coccyx.

The vertebra is the small bone, which is formed by the body and the arch. All the vertebrae compose the spinal column or the spine. There are 32 or 34 vertebrae in the spine of the adult. There are seven cervical vertebrae, twelve thoracic vertebrae, five lumbar, five sacral vertebrae and from one to five vertebrae which form the coccyx in the spinal column. The cervical part of the spine is formed by seven cervical vertebrae. Twelve thoracic vertebrae have large bodies. The lumbar vertebrae are the largest vertebrae in the spinal column. they have oval bodies.

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The lower extremity consists of the thigh, leg and foot. It is connected with the trunk by the pelvis. The upper extremity is formed by the arm, forearm and hand. It is connected with the trunk by the shoulder girdle.

The bones of the skeleton are connected together by the joints or by the cartilages and ligaments. The bones consist of organic and inorganic substance.

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