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DO NOW. Why do diseases of the large intestine often cause diarrhea?

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DO NOW

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  1. DO NOW Why do diseases of the large intestine often cause diarrhea? Main function of the large intestine is to remove water from waste and supply food for a huge amount of intestinal bacteria. If the large intestine is not working properly then too little water may be removed causing excess in the form a diarrhea.

  2. AIM • Discuss the Excretory System • Homework page 994 answer question “ “Performance Based Assessment” - Creative Writing • Coloring Path of Digestion

  3. Circular folds Epithelial cells Villi Capillaries Lacteal Vein Artery Figure 38–14 The Small Intestine Section 38-2 Villus Small Intestine

  4. Liver Function • Produces Bile, an oily fluid that dissolves and disperses droplets of fat found in fatty foods. • Bile is stored in the gallbladder. • Plays a role in both digestion and excretion

  5. Function of the Excretory System • Every cell in the body produces waste, salt carbon dioxide and urea. • Urea- toxic compound produced when amino acids are used for energy. • Excretion is one the many processes of homeostasis.

  6. Kidney Function • “Dirty Blood” enters kidney, urea, extra water, and other wastes, are removed. clean blood leaves the kidney via the renal vein and returns to circulation.

  7. Capillaries Bowman’s capsule Cortex Glomerulus Renal artery Medulla Renal vein Collecting duct Ureter Vein To the bladder Artery To the ureter Loop of Henle Figure 38–17 Structure of the Kidneys Section 38-3 Kidney Nephron

  8. Function of Kidney • 1)Filtration • Most filtration occurs in the glomerulus. Blood pressure forces water, salt, glucose, amino acids, and urea into Bowman’s capsule. Proteins and blood cells are too large to cross the membrane; they remain in the blood. The fluid that enters the renal tubules is called the filtrate.

  9. The Nephron Section 38-3 2) Reabsorption As the filtrate flows through the renal tubule, most of the water and nutrients are reabsorbed into the blood. The concentrated fluid that remains is called urine. 1)Filtration Most filtration occurs in the glomerulus. Blood pressure forces water, salt, glucose, amino acids, and urea into Bowman’s capsule. Proteins and blood cells are too large to cross the membrane; they remain in the blood. The fluid that enters the renal tubules is called the filtrate.

  10. Urine Formation • 3) Urine is collected in the urinary bladder and heads down the tube called the urethra.

  11. Figure 38–19 Kidney Dialysis Section 38-3 Blood in tubing flows through dialysis fluid Blood pump Vein Artery Used dialysis fluid Shunt Air detector Fresh dialysis fluid Dialysis machine Compressed air

  12. The Urinary System Section 38-3 Artery Vein Kidney (Cross Section) Kidney Cortex Medulla Ureter Urinary bladder Urethra

  13. Script – Creative Writing Homework Page 994 1) Two kids sitting on a couch. Kid one is about to eat a hot dog. Kid two is wearing a t-shirt that is a map of the digestive system kid one hey, I got a hot dog and you don’t kid 2, ya wanna know how that hot dog goes from your hand to your toilet? 2) kid one – looks at kid 2 and looks at hot dog slowly says Kid 1 I guess Kid 2 (starts to sing to turkey in straw ) well your nose sends a message to your salivary glands and you start digestion with hot dog in hand. Then your teeth start a chewing with your tongue helping too and it all goes down the esophagus tube.

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