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HomeExclusiveWhat Best Describes The Structure Of The Kidneys

What Best Describes The Structure Of The Kidneys

Which Of The Following Describes The Location Of The Kidneys

Urinary System, Part 1: Crash Course A& P #38

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The kidneys lie against the posterior abdominal wall at the level of vertebrae T12 to L3.

  • The right kidney is slightly lower than the left because of the space occupied by the large right lobe of the liver.
  • Rib 12 crosses the approximate middle of the left kidney.

Additionally, how does the location of the kidneys offer protection?The left kidney sits a bit higher in the body because of the size of the liver, which is also on the right side. Muscles in your back and your ribcage protect your kidneys from both the front and the back sides of your body. There is also fat tissue, called perirenal fat, that surrounds the kidneys for protection.

Regarding this, where are the kidneys located in the body quizlet?

They lie against the muscles of the back in a cushion of fat called perirenal fat. The right kidney lies further cranial than the left.

How does the location of the kidneys offer protection quizlet?

The adipose capsule is a mass of fatty tissue that surrounds the two kidneys. It is used to protect the kidneys from the trauma and help hold them in place within the abdominal cavity.

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Where Are The Kidneys And How Do They Function

There are two kidneys, each about the size of a fist, located on either side of the spine at the lowest level of the rib cage. Each kidney contains up to a million functioning units called nephrons. A nephron consists of a filtering unit of tiny blood vessels called a glomerulus attached to a tubule. When blood enters the glomerulus, it is filtered and the remaining fluid then passes along the tubule. In the tubule, chemicals and water are either added to or removed from this filtered fluid according to the body’s needs, the final product being the urine we excrete.

The kidneys perform their life-sustaining job of filtering and returning to the bloodstream about 200 quarts of fluid every 24 hours. About two quarts are removed from the body in the form of urine, and about 198 quarts are recovered. The urine we excrete has been stored in the bladder for anywhere from 1 to 8 hours.

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What Do Your Kidneys Do

You have two kidneys. They are bean-shaped organs that are located toward your back, on either side of your spine, just underneath the rib cage. Each kidney is about the size of your fist.

Your kidneys have many jobs, but their main job is to filter your blood, getting rid of toxins and excess salt and water as urine. If your kidneys are damaged and dont work as they should, wastes can build up in your blood and can make you sick. Your kidneys also balance the amount of salts and minerals in your body, make hormones that control blood pressure, make red blood cells and keep your bones strong.

What Is Kidney Transplantation

Structure of kidney

Kidney transplantation involves placing a healthy kidney into your body where it can perform all of the functions that a failing kidney cant. Kidneys for transplantation come from two sources: living donors and deceased donors. Living donors are usually immediate family members or sometimes spouses. This is possible because a person can live well with one healthy kidney.

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How Is Kidney Disease Diagnosed

First your healthcare provider will take your medical history, conduct a physical exam, ask about any medication you are currently taking, ask about any symptoms you have noticed, and inquire if any of your family members have kidney disease.

Your healthcare provider will order blood tests, a urine test and will also check your blood pressure.

The blood tests will check:

  • Your glomerulofiltration rate . This describes how efficiently your kidneys are filtering blood how many milliliters per minute your kidneys are filtering. Your GFR is used to determine the stage of your kidney disease.
  • Your serum creatinine level, which tells how well your kidneys are removing this waste product. Creatinine is a waste product from muscle metabolism and is normally excreted in your urine. A high creatinine level in your blood means that your kidneys are not functioning well enough to get rid it in your urine.

A urine protein test will look for the presence of protein and blood in your urine. Well-functioning kidneys should not have blood or proteins in your urine. If you do, this means your kidneys are damaged.

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Where Are My Kidneys

The kidneys are small bean-shaped organs approximately 6 cm wide and 12 cm long and consist of two main layers an inner layer called the medulla and an outer layer called the cortex. Most people have two kidneys that are situated at the back of the abdomen on either side of the spine.

Graphic showing a section through the right kidney with the main structures labelled.

What Else Do Kidneys Do

Structure of the Kidney

Kidneys are always busy. Besides filtering the blood and balancing fluids every second during the day, the kidneys constantly react to hormones that the brain sends them. Kidneys even make some of their own hormones. For example, the kidneys produce a hormone that tells the body to make red blood cells.

Now you know what the kidneys do and how important they are. Maybe next Valentine’s Day, instead of the same old heart, you can give your parents a special card featuring the kidneys!

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How Is Chronic Kidney Disease Treated

There is no cure for chronic kidney disease , but steps may be taken in early CKD to preserve a higher level of kidney function for a longer period of time. If you have reduced kidney function:

  • Make and keep your regular healthcare provider / nephrologist visits.
  • Keep your blood sugar under control .
  • Avoid taking painkillers and other medications that may make your kidney disease worse.
  • Keep your blood pressure levels under control.
  • Consult a dietitian regarding useful changes in diet. Dietary changes may include limiting protein, eating foods that reduce blood cholesterol levels, and limiting sodium and potassium intake.
  • Exercise/be active on most days of the week.
  • Stay at a healthy weight.

What Can I Expect If I Have Kidney Disease

If you have kidney disease you can still live a productive home and work life and enjoy time with your family and friends. To have the best outcome possible, its important for you to become an active member of your treatment team.

Early detection and appropriate treatment are important in slowing the disease process, with the goal of preventing or delaying kidney failure. You will need to keep your medical appointments, take your medications as prescribed, stick to a healthy diet and monitor your blood pressure and blood sugar.

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Capillary Network Within The Nephron

The capillary network that originates from the renal arteries supplies the nephron with blood that needs to be filtered. The branch that enters the glomerulus is called the afferent arteriole. The branch that exits the glomerulus is called the efferent arteriole. Within the glomerulus, the network of capillaries is called the glomerular capillary bed. Once the efferent arteriole exits the glomerulus, it forms the peritubular capillary network, which surrounds and interacts with parts of the renal tubule. In cortical nephrons, the peritubular capillary network surrounds the PCT and DCT. In juxtamedullary nephrons, the peritubular capillary network forms a network around the loop of Henle and is called the vasa recta.

Structural Variations In Vertebrate Kidney

describe the structure and function of kidney

The mammalian kidney is a compact organ with two distinct regions: cortex and medulla. The functional unit of the kidney is the nephron. Variations in nephron structure and physiology equip the kidneys of different vertebrates for osmoregulation in their various habitats. The ability of mammalian kidney to concentrate urine is closely related to the length of the loop of henle. Animals that produce the most highly concentrated urine have very long loops. Those that have a limited ability to concentrate the urine have short loops.

On the other hand, mammals with an intermediate ability to concentrate the urine have kidneys with both short and long loops. Among mammals, those able to excrete the most hyperosmotic urine, such as kangaroo rats and other mammals adapted to the desert, have exceptionally long loops of Henle that maintain steep osmotic gradients in the kidney.

This results in urine becoming very concentrated as it passes from cortex to medulla in the collecting ducts. In contrast, beavers, which rarely face problems of dehydration, have nephrons with very short loops, resulting in a dilute urine. Birds, like mammals, have kidneys with juxtamedullary nephrons that specialize in conserving water.

Bony fishes that live in seawater, being hyperosmotic to their surroundings, face the opposite problem to that of their freshwater. relatives. In many species, nephrons lack glomeruli and capsules, and a concentrated urine is formed by secreting ions into the renal tubules.

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What Causes Kidney Disease

Kidney diseases happen when your kidneys are damaged and cant filter your blood. The damage can happen quickly when its caused by injury or toxins or, more commonly, over months or years.

High blood pressure and diabetes are the two most common causes of chronic kidney disease. Other causes and conditions that affect kidney function and can cause chronic kidney disease include:

  • Glomerulonephritis. This type of kidney disease involves damage to the glomeruli, which are the filtering units inside your kidneys.
  • Polycystic kidney disease. This is a genetic disorder that causes many fluid-filled cysts to grow in your kidneys, reducing the ability of your kidneys to function.
  • Hypertensive nephrosclerosis. Kidney damage caused by chronic, poorly controlled hypertension.
  • Membranous nephropathy. This is a disorder where your bodys immune system attacks the waste-filtering membranes in your kidney.
  • Obstructions of the urinary tract from kidney stones, an enlarged prostate or cancer.
  • Vesicourethral reflux. This is a condition in which urine flows backward refluxes back up the ureters to the kidneys
  • Nephrotic syndrome. This is a collection of symptoms that indicate kidney damage.

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Secretion Of Active Compounds

The kidneys release several important compounds, including:

  • Erythropoietin: This controls erythropoiesis, which is the production of red blood cells. The liver also produces erythropoietin, but the kidneys are its main producers in adults.
  • Renin: This enzyme helps manage the expansion of arteries and the volumes of blood plasma, lymph, and interstitial fluid. Lymph is a fluid that contains white blood cells, which support immune activity, and interstitial fluid is the main component of extracellular fluid.
  • Calcitriol: This is the hormonally active metabolite of vitamin D. It increases both the amount of calcium that the intestines can absorb and the reabsorption of phosphate in the kidney.

A range of diseases can affect the kidneys. Environmental or medical factors may lead to kidney disease, and they can cause functional and structural problems from birth in some people.

Are There Stages Of Chronic Kidney Disease

Structure of kidney | Nephron structure and function

Yes, there are five stages of kidney disease. The stages are based on how well your kidneys are able to do their job to filter out waste and extra fluid from your blood. The stages range from very mild to kidney failure . Healthcare providers determine the stage of your kidney function according to the glomerular filtration rate . Your GFR is a number based on the amount of creatinine, a waste product, found in your blood, along with other factors including your age, race and gender.

Stages of Chronic Kidney Disease
Stage
  • Are African-American, Hispanic, Native American or Asian.
  • Are over 60 years of age.
  • Have a long history of taking painkillers, including over-the-counter products such as aspirin and ibuprofen.

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Why Are The Kidneys So Important

Most people know that a major function of the kidneys is to remove waste products and excess fluid from the body. These waste products and excess fluid are removed through the urine. The production of urine involves highly complex steps of excretion and re-absorption. This process is necessary to maintain a stable balance of body chemicals.

The critical regulation of the body’s salt, potassium and acid content is performed by the kidneys. The kidneys also produce hormones that affect the function of other organs. For example, a hormone produced by the kidneys stimulates red blood cell production. Other hormones produced by the kidneys help regulate blood pressure and control calcium metabolism.

The kidneys are powerful chemical factories that perform the following functions:

  • remove waste products from the body
  • remove drugs from the body
  • balance the body’s fluids
  • release hormones that regulate blood pressure
  • produce an active form of vitamin D that promotes strong, healthy bones
  • control the production of red blood cells

Below you will find more information about the kidneys and the vital role they play in keeping your body functioning.

What Are Some Of The Causes Of Chronic Kidney Disease

Chronic kidney disease is defined as having some type of kidney abnormality, or “marker”, such as protein in the urine and having decreased kidney function for three months or longer.

There are many causes of chronic kidney disease. The kidneys may be affected by diseases such as diabetes and high blood pressure. Some kidney conditions are inherited .

Others are congenital that is, individuals may be born with an abnormality that can affect their kidneys. The following are some of the most common types and causes of kidney damage.

Diabetes is a disease in which your body does not make enough insulin or cannot use normal amounts of insulin properly. This results in a high blood sugar level, which can cause problems in many parts of your body. Diabetes is the leading cause of kidney disease.

High blood pressure is another common cause of kidney disease and other complications such as heart attacks and strokes. High blood pressure occurs when the force of blood against your artery walls increases. When high blood pressure is controlled, the risk of complications such as chronic kidney disease is decreased.

Glomerulonephritis is a disease that causes inflammation of the kidney’s tiny filtering units called the glomeruli. Glomerulonephritis may happen suddenly, for example, after a strep throat, and the individual may get well again.However, the disease may develop slowly over several years and it may cause progressive loss of kidney function.

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Physiologic Considerations In Microscopic Anatomy

The renal tubular system is uniquely structured in order to maximize its physiologic function. One of its primary functions is to concentrate urine accordingly to the bodyâs hydro-osmotic state . A hyperosmotic state results in the excretion of hyperosmotic urine, and the reverse is true for when the body is in a hypo-osmotic state. The kidney is able to carry out this function by 2 mechanisms: the action of antidiuretic hormone on the medullary collecting ducts and the phenomenon termed countercurrent multiplication.

Countercurrent multiplication is responsible for keeping the medullary interstitial osmotic concentration higher than the renal tubular osmotic concentration. When the iso-osmotic fluid from the proximal tubule enters the descending limb, the osmotic concentration gradient forces water to move out of the descending limb. By the time the tubular fluid reaches the bottom of the loop of Henle, it has a higher osmotic concentration than the interstitial medullary fluid in the ascending limb. Hyperosmolar tubular fluid entering the ascending limb causes NaCl to be reabsorbed back into the medullary interstitium passively. Once the tubular fluid reaches the thick ascending limb, more ions are reabsorbed into the medullary interstitium actively.

Clarifying The Terms: Renal Nephrology

Structure of Kidneys

Lets get the grammar straightened out at the outset. You might have heard the terms renal, nephrological, or others when you hear physicians talking about kidneys. The term renal is used interchangeably to refer to anything to do with the kidneys. The word comes from the Latin word for the kidneys, renes.

Similarly, nephros is the Greek term for the kidneys, while logos refers to study. Hence, nephrology is the subspecialty of medicine that deals with the management of kidney diseases, and nephrologists are specialist physicians who deal with the medical management of kidney disease, kidney transplantation, and hypertension.

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