Describe the structure of the stomach, identify its parts, and explain the layers affected by a perforated gastric ulcer.

a. Draw a well labelled structure of the stomach
As an AI, I cannot draw. However, I can identify the parts labeled in the provided diagram of the stomach.

b. Identify the following parts:

• I: Cardia (or Cardiac region)
• II: Fundus
• III: Body
• IV: Pyloric antrum
• V: Pyloric sphincter
• VI: Lesser curvature
• VII: Greater curvature

c. A patient has been diagnosed with perforated gastric ulcer, the layers of the stomach wall damaged by the disease
A perforated gastric ulcer means the ulcer has eroded through all layers of the stomach wall. The layers of the stomach wall damaged by a perforated gastric ulcer are:

• Mucosa (innermost layer)
• Submucosa
• Muscularis externa (or Muscularis propria)
• Serosa (outermost layer)