Помогите, надобно найти ошибку в предложения: 1.each kidney is a small

1.each ureter (not kidney) is a small tube thar carries urine (not blood) from the renal pelvis to the urinary bladder  

2.urea is a colourless (not white) water-soluble compound produced by protein (not fat) metabolism and excreted in urine (not in sweat).  

3.the auxiliary function of the urinary system is to rid the body of unnecessary (not necessary) products that accumulate as a result of cellular metabolism.  

4. The final passageway for the flow of fluid is a thin-walled tube (not glomerulus) called the urethra.  

5. The kidneys (not the lungs) are the organs that filter the blood and excrete (not absorb) the wastes.