. Human and comparative anatomy, physiology, and hygiene . an body, a set ofducts, or vessels, called lacte-als, act like sieves in sep-arating the nourishing part of the food (chyle) from thewaste matter, (residuum.) (Fig. 18.) Q. How is flour separated from the bran 1 How is the chyleseparated from the residuum 1 What are these vessels called 1 THE LACTEALS AND THORACIC DUCT.* 72. The lacteals commence in the internal coat ofthe small intestine. These minute vessels pass throughsmall glands and unite and reunite with each other, un-til one duct is formed, called tho-racic. (Fig. 18.) Q. Wher
. Human and comparative anatomy, physiology, and hygiene . an body, a set ofducts, or vessels, called lacte-als, act like sieves in sep-arating the nourishing part of the food (chyle) from thewaste matter, (residuum.) (Fig. 18.) Q. How is flour separated from the bran 1 How is the chyleseparated from the residuum 1 What are these vessels called 1 THE LACTEALS AND THORACIC DUCT.* 72. The lacteals commence in the internal coat ofthe small intestine. These minute vessels pass throughsmall glands and unite and reunite with each other, un-til one duct is formed, called tho-racic. (Fig. 18.) Q. Where do the lacteals commence ? Describe these vessels. 73. The thoracic duct is about the size of a gooser * Illustrate this lesson by plates and the blackboard. THE LACTEALS AND TH0KAC1C DUCT. 31 quill. This tube commences below the pancreas, andascends behind the stomach, liver, and heart, betweenthese organs and the spinal column, and opens into avein behind the left collar bone. (Fig. 18.) Q. What is the size of the thoracic duct ? Describe its Fig. 18. 1. Small intestine. 2, 2, 2. Lacteals. 3, 3, 3. Thoracicduct. 4. Stomach. 5. Colon. 6. Pancreas. 7. Liver. 8, 8. Heart. 10, 10. Lungs. 11. Large vein into which the thoracic ductopens. 12, 12. Spinal column. 74. The chyle is taken up by the lacteals and con- 32 ANATOMY, PHYSIOLOGY, AND HYGIENE. veyed into the thoracic duct. The waste matter is carriedinto the large intestine. (Figs. 18, 20.) Q. What becomes of the chyle ? Of the waste matter 1 75. The chyle is carried through the thoracic duct, and is poured into a vein at the lower part of the neck, where it mixes with the blood. (Fig. 18.) Q. Through what duct does the chyle pass 1 Into what is itpoured ? With what does it mix ? . 76. The lacteals take up only chyle or what has beendigested. For this reason, intoxicating drinks should,not be used, as they are not digested. Q. Why should not intoxicating drinks be used ? REVIEW. 72, 73. . Anatomy ~\ 71,
Size: 1103px × 2264px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjectanatomycomparative
