It seems you are asking about the structures related to the kidneys and their functions. Here are the clarifications based on your points:
A. Urea:
- Urea is a waste product formed in the liver through the breakdown of proteins. It is then excreted by the kidneys in urine.
B. Structures that connect the kidney to the bladder:
- The ureters are the tubes that connect each kidney to the bladder. They transport urine from the kidneys to the bladder.
C. Structures through which waste leaves the body:
- The waste leaves the body through the urethra, which is the tube that carries urine from the bladder out of the body.
D. Waste removed by the kidney:
- The kidneys filter waste products from the blood, including urea, creatinine, excess salts, and water, which are excreted as urine.
If you have any further specific questions or need additional information about these structures and their functions, feel free to ask!