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Multiple Choice
Which of the following correctly lists the main structural components of the digestive tract in order from mouth to anus?
A
Mouth, stomach, esophagus, small intestine, large intestine, anus
B
Mouth, pharynx, trachea, stomach, large intestine, anus
C
Mouth, esophagus, stomach, large intestine, small intestine, anus
D
Mouth, esophagus, stomach, small intestine, large intestine, anus
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Verified step by step guidance
1
Step 1: Begin by understanding the anatomy of the digestive tract, which is a continuous tube that processes food from ingestion to excretion. The digestive tract is also known as the alimentary canal.
Step 2: Identify the correct sequence of structures in the digestive tract. Food enters through the mouth, where mechanical and chemical digestion begins. The pharynx connects the mouth to the esophagus, but the trachea is part of the respiratory system and not the digestive tract.
Step 3: After the mouth, food moves into the esophagus, a muscular tube that transports food to the stomach. The stomach is responsible for further mechanical and chemical digestion.
Step 4: From the stomach, food passes into the small intestine, where most nutrient absorption occurs. The small intestine is divided into three parts: duodenum, jejunum, and ileum.
Step 5: Finally, food moves into the large intestine, where water absorption and formation of feces occur, before being expelled through the anus. The correct sequence is: Mouth, esophagus, stomach, small intestine, large intestine, anus.