Bell Work: 12/5/13

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Bell Work 12/5/13
You are being timed! You only get 10 minutes to
complete bell work!

• Using the Human Body Quest Bell Work packet,
  complete the questions for digestive and urinary
  systems.
• Use the page numbers provided.

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Word Wall Words

• Chemical digestion
• Mechanical digestion
• Excretion
• Sensory

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Objectives

• Can I explain the basic functions of a major
  organ system? (SPI0707.1.3)
• 40. Digestive and Urinary Systems (one page)

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Digestive System (pg. 260-266)

• The digestive system is a group of organs that
  work together to digest food so that is can be
  used by the body.
• The digestive system is a series of tubelike
  organs called the digestive tract.
• The Digestive Tract Organs
• Mouth, pharynx, esophagus, stomach, small
  intestine, large intestine, rectum, anus
• The liver, gall bladder, pancreas, and salivary
  glands are also part of this system, but food
  does not pass through them.

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Digestive System (pg. 260-266)

• Two types of digestion
• The breaking, crushing, and mashing of food is
  called mechanical digestion.
• In chemical digestion, large molecules are broken
  down into nutrients.

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Digestive System (pg. 260-266)

• Steps of the Digestion
• Mouth
• Teeth- chewing (mechanical digestion)
• Saliva- contains an enzyme that begins chemical
  digestion of carbohydrates changes complex
  carbohydrates (starches) into simple sugars
  (glucose).
• Esophagus- sends food to stomach
• Stomach- breaks down food into a liquid (chyme)
  by the action of muscle contraction (mechanical),
  enzymes, and acids (chemical).
• Pancreas- lies behind the stomach and makes
  digestive enzymes and hormones that regulate
  sugar levels.
• Small Intestine- the organ between the stomach
  and large intestine where most of the break down
  of food happens (chemical) and most of the
  nutrients from food are absorbed by villi.
• Liver-
• Makes bile to break up fat.
• Stores nutrients.
• Breaks down toxins.
• Gall bladder- stores bile produced by the liver
• Large intestine- removes water from mostly
  digested food and turns waste into semisolid
  feces (poop).
• Rectum- stores feces until it leaves the anus.

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• BrainPop Digestive

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Urinary System (pg. 268-271)

• The urinary system contains organs that remove
  waste products from your blood.
• Urinary System Organs
• Kidneys, ureter, urinary bladder, and urethra
• Kidneys are a pair of organs that filter water,
  and wastes from the blood and that excrete
  products as urine.
• Nephrons are microscopic filters in the kidney
  that remove wastes from the blood.

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• BrainPop Urinary

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Drawings

• For each body system, draw and color at least one
  organ that belongs in that body system.
• For example
• Digestive System digestive tract
• Urinary System kidneys, ureter, urinary
  bladder, urethra
• Use your textbook pictures or the sample sheet in
  the folder at your group.

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Human Body Books
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Interesting Facts

• Digestive System
• Teeth are an organ.
• Teeth are not made of bone. Enamel and dentin
  that make up teeth are similar to bone in
  appearance and calcium content, but they are not
  bone. Bone contains blood vessels, but enamel and
  dentin do not.
• The small intestine is 6 m long!
• Gases are also what can make farts smell bad.
  Tiny amounts of hydrogen, carbon dioxide, and
  methane combine with hydrogen sulfide and ammonia
  in the large intestine to give gas its smell.

• Urinary System
• As the water content of the blood drops, the
  salivary glands produce less saliva. This is one
  of the reasons you feel thirsty.
• Some beverages contain caffeine, which is a
  diuretic Diuretics cause the kidneys to make more
  urine, which decreases the amount of water in the
  blood.
• Damage to nephrons can prevent normal kidney
  functioning and can lead to kidney disease. If a
  person's kidneys do not function properly, a
  kidney machine can be used to filter waste from
  the blood.