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The ovary is the female genital gland. Like the testis, it is a paired organ, but it is much smaller; its shape is that of a markedly fattened, irregular ellipsoid.
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The thyroid gland has only topographic relations to the organs of the respiratory tract; in other respects it belongs to the ductless glands (glands with internal secretions). It is situated in the neck in front of the trachea and the lateral portions of the larynx, and is also partly in contact with the lateral wall of the laryngopharynx. Its middle portion is covered by the superficial layer of the deep cervical fascia, and laterally it is immediately beneath the sternothyreoidei, which lie upon the gland, the remaining infrahyoid muscles, the inner margin of the sternocleidomastoideus, and the platysma.
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The large intestine is an approximately cylindrical tube from 120 to 150 cm. in length and of variable width. It is composed of two main portions: the ccecum, with the vermiform appendix, and the colon. These two portions, exactly alike and not sharply demarcated, are arranged in a large horseshoe loop about the small intestine, the large intestine becoming continuous with the rectum on the left.
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The trachea is a rather rigid and constantly open tube, 10 to 12 cm- long and 11 to 18 mm. wide, which leaves the larynx at the level of the intervertebral disc between the sixth and seventh cervical vertebrae and extends to that of the disc between the fourth and fifth thoracic vertebrae. In the latter situation or in front of the fifth thoracic vertebra it divides into two branches, the bronchi, which form a right angle with each other. This division is called the tracheal bifurcation.
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The femur is the largest long bone of the human body and consists of a superior extremity a shaft and an inferior extremity.
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