Page 27 - E-book Digestive System

existence is very important in the human body. There are several types of teeth
arranged in the oral cavity with their respective functions.

Primary teeth Permanent teeth

FUN FACT FUN FACT
Tooth P C 1 1 C P Tooth M P C 1 1 C P M
type type Most adults Most adults
have four
have four
Upper 2 1 2 2 1 2 Upper 3 2 1 2 2 1 2 3 wisdom teeth. wisdom teeth.
Jaw Jaw
But the fact is, But the fact is,
everyone can everyone can
Lower 2 1 2 2 1 2 Lower 3 2 1 2 2 1 2 3
Jaw Jaw have six have six
wisdom teeth wisdom teeth

2. Esophagus
When you eat, the food that has been chewed in the mouth will be passed on
to the stomach organ to pass through the next stage of digestion. This process
involves the digestive tract called the esophagus.
The esophagus is a muscular tube that connects the throat to the stomach. The
esophagus is about 20 centimeters long and is lined with moist pink tissue that is
Mucous. The esophagus is directly behind (trachea) and the heart and in front of
the spine. In the esophagus peristalsis occurs, this movement which helps propel
food from the oral cavity to the stomach for about 6 seconds.

Figure 10. Anatomy of esophagus

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