Question Video: Recalling the Cells that Line the Stomach and Intestines | Nagwa Question Video: Recalling the Cells that Line the Stomach and Intestines | Nagwa

Question Video: Recalling the Cells that Line the Stomach and Intestines Biology • First Year of Secondary School

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Fill in the blank: The stomach and intestines are lined with _ cells. [A] Simple squamous [B] Simple columnar [C] Stratified squamous [D] Simple cuboidal [E] Stratified columnar

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Video Transcript

Fill in the blank. The stomach and intestines are lined with blank cells. (A) Simple squamous, (B) simple columnar, (C) stratified squamous, (D) simple cuboidal, or (E) stratified columnar.

The stomach and intestines are lined with epithelial tissue. This is a type of tissue which functions as lining and protection for body and organ surfaces. The cells of this type of tissue are closely joined together to form a continuous layer.

We can further categorize types of epithelial tissue by the shape and arrangement of the cells. There are three general shapes of epithelial tissue cells. Squamous cells are thin, flat, irregularly shaped cells. We might call these scale shaped. Cuboidal cells are more uniformly square or cube shaped. Columnar cells are taller than they are wide. So we could say they are column shaped. If these cells are found in a single layer, we call them simple. If we find the cells in multiple layers, we call them stratified. These are two of the arrangements we may find epithelial cells in.

When we describe epithelial cells, we combine the shape and the arrangement of the cells. So, we might have simple squamous cells or stratified squamous cells or simple cuboidal cells or stratified cuboidal and so on.

The stomach and intestines are lined with columnar cells, which are particularly suited for the secretion of mucus and other substances and the selective absorption of digested nutrients. These cells are found in a single layer lining the connective tissue in the stomach and intestines, so we would call these cells simple columnar cells. We might remember one reason that these cells would work best in a single layer in the intestines, for example, is because of their absorption function. It is easier for nutrients to be absorbed through a single layer of cells rather than multiple layers of cells.

Therefore, the correct answer is (B). The stomach and intestines are lined with simple columnar cells.

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