Glencoe Health Lesson 4 The Excretory System

The excretory system removes wastes from the body. LESSON 4 The Excretory System The excretory system removes wastes from the body. BIG IDEA New Vocabulary cystitis nephrons ureters urethritis urethra hemodialysis Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 The Excretory System How Excretion Works Main Idea The excretory system uses several organs to remove all types of wastes from the body. The body produces wastes in the form of solids, liquids, and gasses that must be removed so that the body can function well. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

The Lungs, Skin, and Large Intestine LESSON 4 The Excretory System The Lungs, Skin, and Large Intestine The large surface area of your skin allows you to excrete water and sales when you sweat. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

The Lungs, Skin, and Large Intestine LESSON 4 The Excretory System The Lungs, Skin, and Large Intestine The lungs expel carbon dioxide when you exhale. Sweating is a form of excretion that helps to regulate body temperature Solid wastes are eliminated through the large intestine. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 The Excretory System The Liver The liver is the first organ to receive chemicals absorbed from the small intestine. The liver detoxifies the body by processing and excreting into bile such things as drugs, alcohol, and some cellular waste products. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

The Parts of the Urinary System LESSON 4 The Excretory System The Urinary System Kidneys The Parts of the Urinary System Bladder Ureters Urethra Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 The Excretory System The Urinary System The main function of the urinary system is to filter waste and extra fluid from the blood. Urine is liquid waste material excreted from the body. It consists of water and body wastes that contain nitrogen. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 The Excretory System The Kidneys The kidneys remove waste products from the blood through tiny filtering units called nephrons. New Vocabulary nephrons The functional units of the kidneys. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 The Excretory System The Kidneys The kidneys adjust the amount of salts, water, and other materials excreted according to the body’s needs. In this way, the kidneys monitor and maintain the body’s acid-base and water balances. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 The Excretory System The Kidneys The kidneys perform the vital function of removing waste from the blood. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 The Excretory System The Ureters Urine travels from the kidneys to the bladder through the ureters about every 15 seconds. New Vocabulary ureters Tubes that connect the kidneys to the bladder. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

The Bladder and Urethra LESSON 4 The Excretory System The Bladder and Urethra The bladder stores about two cups of urine comfortable for two to five hours. Sphincter muscles help keep urine from leaking. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

The Bladder and Urethra LESSON 4 The Excretory System The Bladder and Urethra The bladder’s sphincter muscles close tightly like a rubber band around the opening of the bladder into the urethra. New Vocabulary urethra The tube that leads from the bladder to the outside of the body. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

Maintaining Your Excretory Health LESSON 4 The Excretory System Maintaining Your Excretory Health Main Idea Healthful behaviors will help keep your excretory system healthy. The excretory function removes wastes that can become toxic from the body. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

Tips for Maintaining Your Excretory Health LESSON 4 The Excretory System Maintaining Your Excretory Health Tips for Maintaining Your Excretory Health Drink at least eight 8-ounce glasses of water each day. Limit your intake of caffeine and soft drinks, which can increase the amount of water lost through urination. Follow a well-balanced eating plan. Practice good hygiene. Get regular medical checkups. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

Excretory System Problems LESSON 4 The Excretory System Excretory System Problems Main Idea Excretory system problems commonly result from infection or blockage. Disorders of the excretory system can have several different causes, including infection, blockage of urine, or natural aging. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

Excretory System Problems LESSON 4 The Excretory System Excretory System Problems Cystitis and urethritis are usually caused by a bacterial infection. Left untreated, the infection can spread to the kidneys. New Vocabulary cystitis Inflammation of the bladder. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

Excretory System Problems LESSON 4 The Excretory System Excretory System Problems Symptoms of cystitis and urethritis include burning pain during urination, increased frequency of urination, fever, and possibly blood in urine. New Vocabulary urethritis Inflammation of the urethra. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

Kidney Problems Nephritis Kidney Stones Uremia LESSON 4 The Excretory System Kidney Problems Nephritis Inflammation of the nephrons. Kidney Stones Salts in the urine crystallize into solid stones and move into the ureter, causing pain and blocking the passage of urine. Uremia Decreased blood filtration by the kidneys leads to abnormally high levels of nitrogen waste products remaining in the blood. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 The Excretory System Kidney Failure Kidney failure occurs when the kidneys lose their ability to function. It can be caused by infection, decreased blood flow, or diseases that damage kidney tissue. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 The Excretory System Kidney Failure Hemodialysis takes three to five hours and is done three or four times per week. New Vocabulary hemodialysis A technique in which an artificial kidney machine removes waste products from the blood. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 The Excretory System Kidney Failure Peritoneal dialysis uses the peritoneum, a thin membrane that surrounds the digestive organs, to filter the blood. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 The Excretory System Kidney Failure Kidney transplant involves the replacement of a nonfunctioning kidney with a healthy kidney from an organ donor. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

LESSON 4 Review The Excretory System After You Read Reviewing Facts and Vocabulary What is the main function of the excretory system? What organs are part of it? The main function is to remove all types of waste from the body. The organs include the large intestine, lungs, skin, liver, kidneys, and bladder. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

After You Read How are a ureter, a urethra, and urethritis different? LESSON 4 Review The Excretory System After You Read Reviewing Facts and Vocabulary How are a ureter, a urethra, and urethritis different? A ureter is a tube that connects a kidney to the bladder. The urethra leads from the bladder to outside the body. Urethritis is an inflammation of the urethra. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

After You Read How can you prevent cystitis and urethritis? LESSON 4 Review The Excretory System After You Read Reviewing Facts and Vocabulary How can you prevent cystitis and urethritis? Practice good hygiene and personal health to prevent harmful bacteria and infection. Glencoe Health Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson Home

Glencoe Health End of Chapter 15 Cardiovascular, Respiratory, and Digestive Systems Lesson 4 The Excretory System Lesson Home