• Urinary System
•             Urinary system refers to the organ system that has the obligation of storing and eliminating urine. The main purpose of the system is getting rid of waste products. In order to accomplish the process of elimination, the urinary system has various operating organs. The organs that comprise the system include kidneys and ureters (Funnell, Koutoukidis & Lawrence, 2008). Other organs in the urinary system are the bladder and urethra. All the parts in the urinary system assist in performing important functions for the benefit of the body. As illustrated below each part of the urinary system has an essential role that assist in creating a strong system (Funnel, 2008).
• Kidneys
•             The kidneys assist in regulation of the blood volume in the body. They help in removing excess water from the blood. This helps in making the level of the blood in the body stable. The other role of the kidney is regulating blood pressure. The kidneys are able to perform this function by regulating the amount of water contained in the blood. Through the help of enzyme rennin, kidneys are able to secret rennin (Herreid, 2007). The enzyme acts as an essential tool in activating the angiotensin-aldosteroine pathway. The kidneys adjust the amount of blood entering and getting out of the system and hence regulating blood pressure. Another role of the kidneys is to regulate blood’s pH level. While performing this role, the kidney excretes ions that does not consist single electron. The ions are normally those of hydrogen. The other role of the kidney is to release the hormone known as erythropoietin. The kidneys produce calcitrol, a chemical that help in synthesis of vitamin D (Herreid, 2007). The other main function of the kidneys is to remove waste from the systems in the body. They manage to perform this function by forming urine in order to release the waste from the body.
• Ureters
•             Both of the ureters connect to the kidney and the urinary bladder. Both of them transport urine to kidney from the renal pelvis. The renal pelvis attach to the kidney in the area beneath the bladder. The position of ureters makes the bladder to compress them and hence urine cannot flow back when there is a high pressure in the bladder especially during urination (Funnell, et al. 2007). The prevention of back-flow is of significant important because failure to have the process operate correctly may result to cystitis. This is inflammation of the urinary bladder can lead to infection.
• Bladder
•             The main function of the bladder is to store urine in the urinary bladder before carrying out its elimination from the body. The other purpose of the bladder is performing the process of micturition. The process also known as urination is expelling urine into the urethra. In this process, there are the actions of which muscles conduct voluntary. Incontinence may result when muscles fail to operate voluntary (Funnell, et al., 2007).
• Urethra
•             Urethra refers to the passageway in which the urine gets out of the body. Another purpose of the urethra is serving as the way in which the semen uses as they get out, in males. The main role of urethra is to help get out the urine in the body system (Herreid, 2007).
• Homeostasis
•             Homeostasis refers to the dynamic change of the parameters in the body due to various factors (Sherwood, 2008). The parameters that contribute to this process especially in the urinary system include the following:
• Osmoregulation
•             Osmoregulation involves the changes made to the osmotic pressure of fluids. The mechanism of the body has an obligation of making sure that the water content does not become neither too diluted nor too concentrated. In this process, kidneys help by getting away excess ions. The urinary system help in getting the excess ions as urine after the process off their secretion is over (Sherwood, 2008).
• Temperature
•             The body maintains a set temperature in its internal environment. Some organs in the body are able to change the temperature depending on various factors like the environment. The organs include those in the urinary system that help to regulate the body thermally (Sherwood, 2008). Muscle contraction primarily helps in generating heat within the body. When the process of urinating occurs, the body loses a certain amount of heat. The blood system comprises the sensors that help in regulating heat prior to the environment. The organs in the urinary system being able to regulate heat contribute to homeostasis.
• Balance of fluid
• In order to maintain homeostasis, adequate balances of fluids within the body are compulsory factor. The balancing process includes both gaining and loosing the level of fluids in the body. Various hormones contribute to the maintenance of the body fluid including those in the urinary system. Tissues that affect homeostasis and lined in the urinary tract include the epithelial tissue. Urinary system has the role of regulating body water. The urinary system helps in excretion of excess water taken in the body (Sherwood, 2008).
• References
• Funnell, R. , Koutoukidis, G. & Lawrence, K. (2008). Tabbner's Nursing Care: Theory and          Practice. New York: Elsevier Australia.
• Herreid, C. F. (2007). Start with a story: the case study method of teaching college science. New   York: NSTA Press.
• Sherwood, L. (2008). Human physiology: from cells to systems. Cengage Learning.