Answer:
<h3>labor for industries.</h3>
Explanation:
The 19th century in U.S saw massive industrialization all over the country. It led to a massive need of workforce and labor to work on these industries. At the same time, new cities started to grow in the country with industrialization and urbanization.
To meet the demands of the new cities, industries started manufacturing more steel, iron, textiles, etc. which all consequently led to the need of more workers and labors in the country.
Solution :
a). The path from mouth to the duodenum is :
Oral cavity ---- Oropharynx ---- Laryngopharynx ---- Esophagus ---- lower esophageal sphincter --- Stomach ---- Pyloric sphincter ---- Duodenum.
b). The digestive functions of the organs are :
ORAL CAVITY
The saliva in the oral cavity or the mouth keeps the mouth mist and it helps in food digestion. The salivary amylase converts the stretch into the maltose.
STOMACH
The stomach produces acidic pH and it helps to break the proteins in the food by the enzyme, Pepsinogen.
DUODENUM
In the duodenum, the chyme is mixed with the enzyme, bile and the pancreatic juice which helps in digestion.
c). In the gastroesophageal reflux, the lower sphincter does not function properly and that is why the gastric content that contains the acid and the pepsin regurgitate into the end of lower esophageal. This area is not an acid resistant, so the ulceration takes place.
d). Elevation of a head-end of the patient's bed, so that the gravity stops in the upward motion of the esophageal contents. The potent acid inhibiting agents like the Omeprazole.
