What is the length of the alimentary canal in human beings? List out the parts of the gastrointestinal tract in the correct sequential order based on the passage of food.

The alimentary canal in human beings is approximately 30 feet (about 9 meters) long. This lengthy tube plays a crucial role in digestion and nutrient absorption.

Parts of the Gastrointestinal Tract

The gastrointestinal tract consists of several key parts through which food passes sequentially. Here’s the correct order:

• Oral Cavity: Where digestion begins with chewing and saliva.
• Esophagus: A muscular tube that transports food to the stomach.
• Stomach: A sac-like organ where food is mixed with digestive juices.
• Small Intestine: Comprising three sections (duodenum, jejunum, ileum), this is where most nutrient absorption occurs.
• Large Intestine: Also known as the colon, it absorbs water and forms waste.
• Rectum: The final section that stores waste before it is expelled.
• Anus: The opening through which waste leaves the body.

Each part of the gastrointestinal tract plays a specific role in the digestion process, ensuring that nutrients are effectively absorbed and waste is eliminated.