Answer:
Genes or alleles
Explanation:
Genes and Alleles help with traits:)
As an ammonia molecule, I begin in the blood stream. I pass through the heart and down the aortic trunk to the renal artery and into the kidney. Once there, I begin in the renal cortex where I find a renal corpuscle. I am absorbed by the renal corpuscle by specific gravity and descend around the nephron loop. I ascend the other side and am sent to a collecting duct. This collecting duct takes me to a papillary duct and into one of the minor calyces. This minor calyx feeds me into a major calyx, along the renal pelvis where I combine with other compounds, such as water, ions, acids, drugs, and toxins to form urea. We are sent through the hilum and down into the ureter. The ureter takes us to the bladder where we wait for urination. As we exit the bladder and are combined with creatinine and uric acid, we become collectively known as urine and are sent down the urethra to exit the body.
