Kidneys and the Excretory System1)The kidneys' job is to filter your blood. The kidney is important because theyremove wastes, control the body's fluid balance, and keep the right levels ofelectrolytes. All of the blood in your body passes through them several times aday. Blood comes into the kidney, waste gets removed, and salt, water, andminerals are adjusted, if needed.2)Renal ArteryThe renal artery branches off from thelower part of the aorta and providesthe blood supply to the kidneys. Renalveins take blood away from thekidneys into the inferior vena cavarenal veinRenal Veins carry filtered blood fromthe kidneys to the posterior vena cava.UreterThe ureter is a tube that carries urinefrom the kidney to the urinary bladder.There are two ureters, one attached toeach kidney. The upper half of theureter is located in the abdomen andthe lower half is located in the pelvicarea.BaladderThe bladder is connected to thekidneys by two long tubes calledureters. When urine is produced bythe kidneys, it travels down the uretersto the bladder, where it is stored. Thebladder has four layers.UrethraThis tube allows urine to pass outsidethe body. The brain signals thebladder muscles to tighten, whichsqueezes urine out of the bladder.
3)The primary function of nephron is removing all waste products including thesolid wastes, and other excess water from the blood, converting blood into theurine, reabsorption, secretion, and excretion of numerous substances.4)Your kidneys also remove acid that is produced by the cells of your body andmaintain a healthy balance of water, salts, and minerals—such as sodium,calcium, phosphorus, and potassium—in your blood. Without this balance,nerves, muscles, and other tissues in your body may not work normally.