Areas of the spleen that contain large aggregations of lymphocytes are known as:

• A. Sinusoids
• B. Red pulp
• C. Trabeculae
• D. White pulp

Answer: (D)

Verified step by step guidance

1. Understand the structure and function of the spleen: The spleen is an organ involved in immune response and blood filtration. It has two main regions: red pulp and white pulp, each with distinct functions.
2. Learn about white pulp: White pulp is a region in the spleen that is rich in lymphocytes (a type of white blood cell). It is organized around central arteries and plays a key role in immune responses by detecting and responding to pathogens in the blood.
3. Differentiate between the options: Sinusoids are blood-filled spaces in the red pulp, red pulp is involved in filtering and recycling red blood cells, and trabeculae are connective tissue structures that provide support within the spleen. None of these are associated with large aggregations of lymphocytes.
4. Identify the correct answer: Since white pulp contains large aggregations of lymphocytes and is involved in immune function, it is the correct answer to the question.
5. Conclude: The areas of the spleen that contain large aggregations of lymphocytes are known as white pulp, based on their structure and function in the immune system.