The term arthritis is used to describe numerous rheumatic diseases and conditions that affect joints. Some forms of arthritis, such as rheumatoid arthritis and lupus, can affect multiple organs and cause widespread symptoms.he term arthritis is used to describe numerous rheumatic diseases and conditions that affect joints. Some forms of arthritis, such as rheumatoid arthritis and lupus, can affect multiple organs and cause widespread symptoms.
The urinary system consists of the kidneys, ureters, urinary bladder, and urethra. The kidneys filter the blood to remove wastes and produce urine. The ureters, urinary bladder, and urethra together form the urinary tract, which acts as a plumbing system to drain urine from the kidneys, store it, and then release it during urination.
The kidneys are bilateral bean shaped organs, located in the posterior abdomen. They are reddish-brown in colour. The main function of the kidneys is to filter and excrete waste products from the blood.They are also responsible for water and electrolyte balance in the body.Metabolic waste and excess electrolytes are excreted by the kidneys to form urine. Urine is transported from the kidneys to the bladder by the ureters.he kidneys lie retroperitoneally (behind the peritoneum) in the abdomen, either side of the vertebral column. The left and right kidneys are located at different vertebral levels: 1  Left kidney: T11- L2. 2  Right kidney: T12 â L3 (it is lower due to the presence of the liver).