White pulp constitutes approximately what percentage of splenic tissue?

White pulp constitutes approximately what percentage of splenic tissue?

• A. Red pulp (85%)
• B. Marginal zone
• C. PALS
• D. White pulp (15%)

Answer: (D)

White pulp is the immune portion of the spleen and forms a minority of splenic tissue. In the spleen, most tissue is red pulp, which handles filtering the blood and removing old or damaged cells; the white pulp is organized around the central arteries as periarterial lymphoid sheaths (PALS) and lymphoid nodules. The commonly cited distribution is that white pulp makes up about 15% of splenic tissue, with red pulp comprising the remaining ~85%. The marginal zone sits at the boundary between white and red pulp, and PALS is a specific component within white pulp. So, the figure around 15% reflects white pulp being the smaller portion of the two major splenic compartments.

White pulp is the immune portion of the spleen and forms a minority of splenic tissue. In the spleen, most tissue is red pulp, which handles filtering the blood and removing old or damaged cells; the white pulp is organized around the central arteries as periarterial lymphoid sheaths (PALS) and lymphoid nodules. The commonly cited distribution is that white pulp makes up about 15% of splenic tissue, with red pulp comprising the remaining ~85%. The marginal zone sits at the boundary between white and red pulp, and PALS is a specific component within white pulp. So, the figure around 15% reflects white pulp being the smaller portion of the two major splenic compartments.