Which of the following tissues lines the majority of the digestive tract, from stomach to rectum?

• A. simple columnar
• B. simple squamous
• C. transitional
• D. stratified cuboidal
• E. pseudostratified ciliated columnar

Answer: (A)

Verified step by step guidance

1. Understand the function of the digestive tract lining: The lining of the digestive tract is primarily involved in absorption and secretion. It needs to be efficient in nutrient absorption and secretion of digestive enzymes and mucus.
2. Identify the characteristics of each tissue type: Simple columnar epithelium is known for its role in absorption and secretion, featuring tall, column-like cells that provide a large surface area. Simple squamous epithelium is thin and flat, suitable for diffusion but not for absorption. Transitional epithelium is specialized for stretching, found in the urinary system. Stratified cuboidal epithelium is protective, found in glandular ducts. Pseudostratified ciliated columnar epithelium is involved in secretion and movement of mucus, found in respiratory pathways.
3. Match the tissue type with the digestive tract function: The digestive tract requires a lining that can efficiently absorb nutrients and secrete mucus. Simple columnar epithelium, with its tall cells and microvilli, is well-suited for these functions.
4. Consider the location and function of each tissue type: Simple columnar epithelium lines most of the digestive tract, from the stomach to the rectum, due to its ability to facilitate absorption and secretion. Other tissue types do not match the functional requirements of the digestive tract.
5. Conclude with the most appropriate tissue type: Based on the functional requirements and characteristics, simple columnar epithelium is the tissue that lines the majority of the digestive tract, from stomach to rectum.