Chapter 1 - Anatomy
Structure of the body
Chemical Properties of the Body
Physical Properties of the Body
Vital Properties of the Body
The Human Skeleton - Diagram
Anatomy of the Bones
Bones of the Head
Bones of the Trunk
Bones of the Upper Extremities
Bones of the Lower Extremities
The joints
Uses of the Bones
The Muscles
The Muscles - Front Diagram
The Muscles - Back Diagram
The Teeth
Uses of the Teeth
Digestive Organs
Urinary System
Respiratory Organs
Organs of Circulation
Absorbent Vessels
Organs of Secretion
Vocal Organs
The Skin
The Nervous System
Organs of Sight
Organs of Hearing

1.23 Absorbent Vessels

The Absorbent Vessels.

THE vessels which absorb the chyle from the small intestines, and convey it onward towards the blood, are the lacteals. They have been described. The veins are also supposed to have the power of absorption, particularly the small commencements of the veins. These have likewise been described.

The Lymphatic vessels resemble the lacteals. They abound in the skin, the mucous membranes, and the lungs. They are very small at their origin, and, like the veins, they increase in size, as they diminish in numbers. Like the veins, too, they travel towards the heart, and their contents are poured into it. Their walls are composed of two coats; the external is cellular, and distensible ; the internal is folded into valves, like that of the veins.

These vessels, on their way to the heart, pass through soft bodies, called lymphatic glands, which bear to them the relation that the mesenteric glands do to the lacteals. These glands axe a collection of small vessels. The lymphatic glands are most numerous in the neck, chest, abdomen, armpits, and groins. They are also found, to some extent, in other parts of the body. Fig. 35 shows a single lymphatic vessel, much magnified; Fig. 36 exhibits the valves along one of the lymphatic trunks; Fig. 37 shows a lymphatic gland with the vessels passing through it. Fi. 38 represents the lymphatic vessels and glands. 1, 2, 3, 4, 5, 6, show these vessels of the lower limbs; 7, the inguinal glands; 8, the commencement of the thoracic duct, into which the contents of lymphatic are poured; 9, the lymphatics of the kidneys; 10, those of the stomach; 11, those of the liver; 12, 12, those of the lungs; 13, 14, 15, those of the arm; 16, 17, 18, those of the face and neck; 19, 20, the large veins; 21, the thoracic duct; 26, the lymphatics of the heart. A cold will often cause lymphatic glands to swell. These swellings are called kernels. They often swell, also, without the irritation from cold, and become very much and permanently enlarged, particularly in scrofula. In scrofulous subjects they sometimes suppurate and break, forming bad sores upon the neck.

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