A tissue is a distinctive material of the body made of similarly specialized cells which are organized in an orderly manner to suit tissue function. Many tissues performing similar functions form an organ. There are four main tissues in the body, which include: connective tissue, muscle tissue, nervous and epithelial tissue. The tissues are specialized uniquely for function in different organs (Mader, 2015) . The urinary system, otherwise known as the renal system, is made up of the bladder, ureters, the kidney, and urethra. The organs work together to ensure the elimination of waste from the body, homeostasis, electrolytes balance, regulating blood volume and blood pressure control.
The kidney filters out waste the blood and expels the waste into urine which, is then excreted out by the urethra. An average person has two kidneys located on each side of the lumbar vertebrae (Mader, 2015) . Each is firmly kept in position by a tissue named renal fascia, which is encircled by per renal fat, which contains a wide layer of adipose tissue that protects the kidney. The renal capsule within which each kidney is contained is made up of connective tissues, which are fibrous and provide support for the tissue inside. The cortex and medulla are made up of parenchyma tissue, which contains all the structures involved in waste removal; it is usually the most functional part of an organ (Mader, 2015) .
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The ureter transports urine from the pelvis of the excretory system to the bladder. The fibrous outer layer wall is made up of fibrous connective tissue, which provides support to the ureter. The urinary bladder is where urine is stored temporally. The submucosa is composed of elastic connective tissue, which also provides support to the mucous membrane. The urethra is the final passageway of urine out of the body (Mader, 2015) . The walls of urethra have smooth muscle fibres and connective tissues for support.
References
Mader, S., & Windelspecht, M. (2015). Human biology . McGraw-Hill Education .
