Chapter 23 Respiration and Excretion. Excretory System Many different chemical changes take place in...
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Transcript of Chapter 23 Respiration and Excretion. Excretory System Many different chemical changes take place in...
![Page 1: Chapter 23 Respiration and Excretion. Excretory System Many different chemical changes take place in cells. – As these changes take place waste products.](https://reader035.fdocuments.us/reader035/viewer/2022062422/56649ed15503460f94bdff4f/html5/thumbnails/1.jpg)
Chapter 23Respiration and Excretion
![Page 2: Chapter 23 Respiration and Excretion. Excretory System Many different chemical changes take place in cells. – As these changes take place waste products.](https://reader035.fdocuments.us/reader035/viewer/2022062422/56649ed15503460f94bdff4f/html5/thumbnails/2.jpg)
Excretory System• Many different chemical
changes take place in cells.– As these changes take place
waste products form.– Ex: Cellular Respiration -> CO2
+ H2O
– Other waste products from cells: salts, nitrogen compounds, and heat.
![Page 3: Chapter 23 Respiration and Excretion. Excretory System Many different chemical changes take place in cells. – As these changes take place waste products.](https://reader035.fdocuments.us/reader035/viewer/2022062422/56649ed15503460f94bdff4f/html5/thumbnails/3.jpg)
Excretory System cont.• What is the function of the Excretory system?
1) Cell protection2) Blood movement3) Waste removal4) Food breakdown5) Regulations of hormones
• Waste products can be harmful to the body if they build up and collect in the body.
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What major components make up the excretory system?
• Kidneys• Ureter• Urinary Bladder• Urethra• Skin
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Kidenys• Humans have 2 kidneys
which are located just above your waistline.
• Main job of the kidney is to remove waste products from the blood
• Each minute about 1 L of blood pass through your kidney.
• In 1 day your kidneys remove waste products from about 170 L of blood.
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Kidenys cont.• Millions of tiny tubelike structures called
nephrons are located inside the kidney.• Nephrons are the filtering structures of the
kidneys
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How do nephrons filter waste products and nutrients from the blood? How are
nutrients returned to the blood?
![Page 8: Chapter 23 Respiration and Excretion. Excretory System Many different chemical changes take place in cells. – As these changes take place waste products.](https://reader035.fdocuments.us/reader035/viewer/2022062422/56649ed15503460f94bdff4f/html5/thumbnails/8.jpg)
What is the main function of the kidney?
1) Protections2) Produce hormones3) Waste removal4) Support and Shape5) Kill bacteria
![Page 9: Chapter 23 Respiration and Excretion. Excretory System Many different chemical changes take place in cells. – As these changes take place waste products.](https://reader035.fdocuments.us/reader035/viewer/2022062422/56649ed15503460f94bdff4f/html5/thumbnails/9.jpg)
What are the filtering structures of the kidney?
1) Ureter2) Urethra3) Collecting tube4) Artery5) Nephron
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Waste removal
• Waste products leave the kidney through the collecting tube as a liquid called urine.
• Urine = H20 + salts + urea
• Excretion is not completed until urine is removed from the body.
• The job of the urinary system is to remove liquid waste (urine) from the body.
![Page 11: Chapter 23 Respiration and Excretion. Excretory System Many different chemical changes take place in cells. – As these changes take place waste products.](https://reader035.fdocuments.us/reader035/viewer/2022062422/56649ed15503460f94bdff4f/html5/thumbnails/11.jpg)
How is urine removed?• Urine leave the kidneys through a tube called the
ureter.• 1 ureter from each kidney carries urine to the
urinary bladder, which is a muscular sac that stores urine.
• When the bladder becomes full, muscles from the bladder contract forcing out the urine into the urethra.
• The urethra carries urine to the outside of the body.
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![Page 13: Chapter 23 Respiration and Excretion. Excretory System Many different chemical changes take place in cells. – As these changes take place waste products.](https://reader035.fdocuments.us/reader035/viewer/2022062422/56649ed15503460f94bdff4f/html5/thumbnails/13.jpg)
What is urine made of?
1) Water2) Salt3) Urea4) Glucose5) 1,2, and 3
![Page 14: Chapter 23 Respiration and Excretion. Excretory System Many different chemical changes take place in cells. – As these changes take place waste products.](https://reader035.fdocuments.us/reader035/viewer/2022062422/56649ed15503460f94bdff4f/html5/thumbnails/14.jpg)
What tube carries urine outside of the body?
1) Ureter2) Urinary bladder3) Urethra4) Nephrons5) Collecting tube
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Skin• Skin has small structures
called sweat glands, which excrete waste products in the form of perspiration.
• Perspiration = H2O + salts + urea
• Each sweat glands has a small tube that leads to the surface of the skin called a pore.
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Skin cont.• You have millions of pores in
your skin.• Sweat produced in the sweat
glands leaves your body through these pores.
• Sweat that reaches the skin’s surface evaporates quickly, which cools your body.
• Excess heat is removed from your body as it cools, which helps regulate body temperature.
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What is the major function of the skin?1) Protection2) Sensation (touch)3) Excretion4) Temperature regulation5) All of the above
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What other organ besides the skin removes H2O, salts, and Urea?
1) Liver2) Kidney3) Heart4) Stomach5) Intestines
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Excretory Problems• Kidney Stones• Acne
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Kidney Stones• They are formed from calcium compounds and
nitrogen wastes that are not excreted by the body.
• Small kidney stone can pass through the ureter, but can cause great pain.
• Large kidney stones cannot pass through the ureter, causing a blockage which can destroy kidney cells.
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How are large kidney stones removed?• Medication – causes the stone to dissolve and
break apart• Surgery – involves the risk of infection, can lead to
complications.• Sound waves – aim shock waves at the stone
causing it to vibrate and break apart
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How are large kidney stones removed?
lithotripsy treatment for kidney stones
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Acne• Is a combination of skin
diseases.• Symptoms: whiteheads,
blackheads, and pimples.• Whiteheads &
blackheads develop when oils clog the pores of the surface of the skin.
• A pimple forms when a blackhead is infected with bacteria.
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Why would washing your face several times each day help control acne?
1) Helps remove dead skin2) Helps remove excess oil3) Helps prevent clogged pores4) All of the above
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Controlling Acne
1. Wash your face several times per day with soap and water
2. Apply a dry lotion to the skin after washing
3. Avoid oily cosmetics
4.Remove all cosmetics before going to bed
5.Eat a well balanced diet
6. Get plenty of rest and exercise