1 / 48

Lesson: EXCRETION

The Excretory Systems. Lesson: EXCRETION. What does the excretory system do?. Excretion is the process of removing metabolic wastes. Excretion by Digestive System (Large Intestine). The Large Intestine Not all foods are digested and absorbed by our body.

vala
Télécharger la présentation

Lesson: EXCRETION

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Excretory Systems Lesson:EXCRETION

  2. What does the excretory system do? • Excretion is the process of removing metabolic wastes.

  3. Excretion by Digestive System (Large Intestine) • The Large Intestine • Not all foods are digested and absorbed by our body. • The undigested food is passed into the large intestine for temporary storage.  • The undigested food contains a large amount of water and dissolved minerals like iron, calcium, and magnesium.  • Some of the water and the dissolved minerals are absorbed by the walls of the large intestine and returned to our body through blood circulation.  • The remaining solid waste after absorption is called feces.  • Feces contains bacteria, undigested food, bile, and the remaining water and minerals. • It is discharged by the large intestine through the rectum.  It then leaves our body through the anus.

  4. Excretion by Respiratory System (Lungs) The Lungs The lungs are not only organs of respiration but also organs of excretion.  The lungs give off • carbon dioxide • water vapor as waste products.  These are picked up by the blood from the cells and brought to the lungs.  Then, the lungs give them off as we exhale or breathe out.

  5. Excretion by Integumentary System (Skin) The Skin removes metabolic wastes.  These metabolic wastes move out of the blood vessels through the capillaries into the sweat glands.  The skin excretes the following: • water • urea • salt

  6. Excretion by Integumentary System (Skin) Each sweat gland has a sweat tube that leads to a small opening in the skin’s surface called pore. This is where water and salt pass out of the skin.  These wastes are collectively called sweatorperspiration.

  7. Different Excretory Systems

  8. CALORIES INCoca-Cola's Sodas, Soft Drinks: Coca-Cola, Classic

  9. Calories inFresh Banana, raw

  10. Importance of Water in Human Body • Water helps to remove the dangerous toxins that our body takes in from the air, the food and the chemicals we use on our skin and hair. • Water also provides cushion for our body joints. • Water carries oxygen and nutrients into all our cells. • Water also helps to regulate our body temperature.

  11. Our body has integrative body systems. When we say “integrative”, this means that our body systems are interconnected to each other to maintain homeostasis.

  12. Our body is so sensitive to everything we take in our body and to environment outsidewhere we live in. And because of its sensitivity, we need other body system to perform other major liquid excretionaside from excretion by our skin.

  13. What is human homeostasis? Word origin: from the Greek:homeo, meaning unchanging + stasis, meaning standing. • Human homeostasis refers to the body's ability to physiologically regulate its inner environment to ensure its stability in response to fluctuations in the outside environment and the weather. • it is the state of balance in our body.

  14. What will happen if you do not have the ability to maintain homeostasis in our body? Homeostatic imbalancewill lead to diseases or even death.

  15. The blood, which carries waste materials and other substances, enters the kidneys through the renal artery.

  16. as blood surges through the kidneys, a filtering unit called nephrons filters the blood with nitrogenous waste urea, uric acid, salts and other metabolic wastes.

  17. Nephrons • Excess salts, water, wastes remain in the tubule and become urine • Urine enters collecting ducts (tubes) in the medulla • Collecting tubes empty into the renal pelvis (first section of the ureter) • All the blood in the body passes through the kidneys about 20 times every hour. 

  18. What is Uric Acid? • Uric acid is a chemical created when the body breaks down substances called purines. • Purines are found in some foods and drinks, such as liver, anchovies (oil fishes), mackerel, dried beans and peas, beer, and wine.

  19. The substances that are useful to the body are brought back into circulation.  Together with the clean blood, they leave the kidneys through the renal veins to the inferior vena cava and to the different parts of the body.

  20. The urine leaves the kidneys through the ureters, a muscular tubes 10-12 inches long that moves urine from the kidney to the urinary bladder.

  21. The urinary bladder(a hollow sac organ) that temporarily stores the urine that passes from the two ureters. The urethrafinally carries urine from bladder to outside of the body.

  22. The Urinary System

  23. The Urinary System

  24. Urethra • Tube carries urine from bladder to outside • Difference in male/female • Females shorter • Opens in front of vagina • Male: carries both urine from urinary system and semen from the reproductive system

  25. Summary • The state of balance in our body is called? • Human homeostasis. • The urinary system consists of the ? • kidneys, ureters, urinary bladder and urethra. •   Kidneys are ? • bean-shaped organ that contains filtering units called nephrons. • The ureters are ? • muscular tubes 10-12 inches long that moves urine from the kidney to the urinary bladder. • Urinary bladder ? • temporarily store the urine that pass from the two ureters. • Urethra ? • is a tube that carries urine from bladder to outside of the body.

  26. Different Excretory Systems

  27. CAUTION

  28. How many times do you urinate in one day? • Humans produce about 2.9 liters of urine over 24 hours.

  29. What will happen if one of your kidney fail to function? • Dialysis, a treatment where a machine does the job of the kidneys to filter the blood. • used to provide an artificial replacement for lost kidney function . • (renal replacement therapy) due to renal failure.

  30. What will happen if both of your kidneys failed to function? • Kidney transplantation means replacement of the failed kidneys with a working kidney from another person, called a donor. • Kidney transplantation is not a complete cure, although many people who receive a kidney transplant are able to live much as they did before their kidneys failed.

  31. Kid Nephrologist Donor A physician specializes in kidney diseases

  32. Kidney transplantation

  33. Prevention • Do not delay urination when it is necessary. • Drink 6-8 glasses of water every day. •  Eat a healthy diet. Avoid eating salty foods. • Avoid drinking soft drinks and alcoholic drinks like beer and wine.

  34. Short Quiz

  35. 1.

  36. 2.

  37. 3.

  38. 4.

  39. 5.

  40. A. Matching Type. Match Column A to Column B. Letters only. Column A ___1. the major system excretion that removes liquid wastes. This excretory system consists of the kidneys, ureters, urinary bladder and urethra. ___2. used to provide an artificial replacement for lost kidney ___3. replacement of the failed kidneys with a working kidney from another person, called a donor. ___4. A physician who specializes in kidney disease. ___ 5. the state of balance in our body Column B • A. Dialysis • B. Human homeostasis • C. Kidney transplantation • D. Nephrologist • E. Urinary System

  41. B. Trace the process through which urine is produced. Write 1, 2, 3, 4, and 5 on the blank according to order of urine production. 6. The Urinary bladder (a hollow sac organ) then temporarily stores the urine that passes from the two ureters. The urethra finally carries urine from bladder to outside of the body. 7. Excess salts, water, and wastes remains in the tubule and become urine after filtration. The substances that are useful to the body are brought back into circulation.  Together with the clean blood, they leave the kidneys through the renal veins. 8. as blood surges through the kidneys, a filtering unit called nephrons filters the blood with nitrogenous waste urea, uric acid, salts and other metabolic wastes. 9. Blood enters each of the kidneys through a large artery that branches off from the aorta through the renal arteries. 10. the urine leaves the kidneys through the ureters, a muscular tubes 10-12 inches long that moves urine from the kidney to the urinary bladder.

  42. ASSIGNMENT. Please do a research on the following urinary disorders. Look for the Symptoms and Treatments or Preventions of each disease. One urinary disease in each group. • Cystitis - Group 1 • Urethritis - Group 2 • Renal Failure – Group 3 • References: • http:// en.wikipedia.org/wiki/Urination_disorder • Biology Science Impact by Pacifico C. Paywal and et. al., Academe Publishing House Inc 2006, pages 502 – 503 and pages 580 – 581.

  43. Criteria in judging class presentations of research.

  44. Thank You for Listening. Always remember “Prevention is BETTER than cure.”

More Related