Where does filtration occur in the kidney?

What is the primary function of tubular secretion in the nephron?

What is the function of the renal capsule?

What is the function of the esophagus?

What is the function of the mesenteries?

Which layer of the digestive tract contains blood vessels and nerves?

What is the role of lipoproteins in the digestive system?

What is the renal pelvis?

What is the innermost layer of the digestive tract called?

What is the name of the opening between the stomach and the small intestine?