Ace the FFA Vet Science CDE 2025 – Cultivate Your Future in Animal Care!

The vena cava is not involved in the filtration process of blood through the urinary system. Instead, the vena cava is a large vein that carries deoxygenated blood from the body back to the heart. Its primary function is related to the circulation system, not the process of filtering waste products from the blood.

In contrast, nephrons, the medulla, and kidneys are integral components of the urinary system. Nephrons, which are the functional units of the kidneys, actively participate in filtering blood, reabsorbing essential substances, and secreting waste into the urine. The medulla, located in the inner part of the kidney, plays a role in the concentration of urine by managing the reabsorption of water and salts. The kidneys themselves house the nephrons and are the primary organs responsible for filtering blood to produce urine, thus demonstrating their essential role in the urinary system.