Anatomy & Physiology Circulatory #10


Which structure filters the blood as it moves throughout the human body?


  1. Arteries
    • Rationale:

      Arteries are a circulatory system structure that carry oxygenated blood for distribution throughout the body.

  2. Capillaries
    • Rationale:

      Capillaries are a circulatory system structure and are the site for gas exchange.

  3. Vena cavas
    • Rationale:

      There are two vena cavas within the human body, the inferior vena cava and the superior vena cava. These circulatory structures bring oxygen-poor blood to the heart for pulmonary circulation to occur.

  4. Lymph nodes
    • Rationale:

      There are many lymph nodes throughout the human body. Their function is to filter the blood.


The lymphatic system is defined as the network of vessels through which lymph drains from the tissues into the blood.


Learning Outcomes

The lymphatic system also consists of lymph nodes, organs, and vessels. Lymphatic organs include the bone marrow, thymus gland, tonsils, and the spleen. As a lymphatic subsystem of the circulatory system, it is the lymph nodes that filter the blood as it moves throughout the human body.

Test Taking Tip

Consider the function of each structure to correctly answer this question.

Video Rationale