The ________ is the main site of nutrient absorption.

How does pyelonephritis begin?

Letter L on the figure of the digestive system refers to the [OPT1].

Number 7 on the figure of the male reproductive system is the [OPT1].

The structure shown at number 2 on the figure is the [OPT1].

Which of these results from the breakdown of the lining of the stomach?

Inflammation of the liver is ________.

Renal calculi could result from ________.

Number 15 on the figure of the male reproductive system represents the [OPT1].

The [OPT1] is shown at letter C on the figure of the digestive system.