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Unit 3 Lesson 5 How Do Our Bodies Digest Food,
Remove Wastes, and Send Messages?
Copyright © Houghton Mifflin Harcourt Publishing Company
How do our bodies digest food, remove wastes and send messages ?
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Let’s think together? • Why do we need food? •How could food reach all our body parts? •What system is responsible for that process? •This system is made up of a group of __________ .
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Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
What Goes In...
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• Food travels through your body until all the useful parts are absorbed.
• Food travels down the esophagus, a long tube that begins in the throat.
• The stomach is a muscular
bag that mashes food into a liquid and mixes it with digestive juices. The food then passes to the small intestine.
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
What Goes In...
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• The small intestine is a long coiled tube that digests food and absorbs nutrients.
• In the large intestine,
water and minerals are soaked up, leaving only waste. Solid waste passes out of your body.
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
What Goes In...
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• Identify the esophagus, stomach, small intestine, and large intestine in the image below.
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Exit slips:
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• Q1-
• Q2-
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Exit slips:
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• Q3-
• Q4-
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Q5 :
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Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
What Goes In...
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• The liver makes bile that helps break large blobs of fat into tiny droplets so the fats can be broken down more easily.
• The pancreas makes juices that
are released into the small intestine to break down fats and proteins to be absorbed by the body.
• The gallbladder stores bile from the liver and sends it to the small intestine only when food passes through.
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Food for Thought
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• Nutrition information on a package label can help you make healthy food choices.
• The number of servings,
calories, proteins, carbohydrates, fats, and nutrients and their daily recommended amounts are listed on the label.
• Calories are a way to measure
how much energy your body will get from food.
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
...Must Come Out
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• The excretory system rids the body of waste and keeps water and salt levels in balance.
• When nutrients are broken
down, waste products are made.
• The liver converts ammonia,
which is very toxic, to urea, which is less toxic. Your body releases this as urine.
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
What are the parts of the EXCRETORY SYTSEM?
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1-The lungs: • The lungs are part of the
excretory system. • Your body produces carbon
dioxide as a waste.(after food is burned)
• Carbon dioxide is released by
your lungs when you breathe out. (exhale)
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Copyright © Houghton Mifflin Harcourt Publishing Company
• 2- The skin: • The skin helps you get rid of the excess salts and water in
sweat.
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Copyright © Houghton Mifflin Harcourt Publishing Company
• The urinary system filters the blood and rids the body of wastes as urine.
• The urinary system is
formed of: -Kidneys - ureters - bladder - urethra
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
3- The Urinary system:
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• Urine collects in tubes called ureters that move the urine to the bladder.
• The bladder stores urine until is released.
• The urethra is a small tube
that moves urine from the bladder to outside of the body.
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
• The kidneys are organs that remove (filter) waste from the blood and help to conserve water and keep the amount of salt in the blood balanced.
Q6: CW 1
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Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Word bank:
Bladder- ureters – urethra - kidneys
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Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Q7: CW 1
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Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Q: Q1 CW:2
Chemical Messages
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• Hormones are chemicals that carry messages through the body that result in growth and different changes.
• Groups of cells called glands produce hormones. Glands and hormones make up the endocrine system.
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Copyright © Houghton Mifflin Harcourt Publishing Company
• The pituitary gland, located
underneath the brain, produces hormones that tell other glands what to do. It also releases growth hormones.( Master gland)
• The thyroid produces a hormone
that goes up when you need energy and goes down when you have enough energy.
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Q3: CW 2
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Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
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• The adrenal gland, located
above each kidney, produces a hormone called adrenalin that helps the body to defend itself. (How?)
• The pancreas produces a
hormone that controls sugar in your blood.
• When the amount of sugar is high, the hormone insulin is released. When your blood sugar is low, the pancreas stops releasing insulin.
Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Q4: CW 2
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Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
Q2 CW 2
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Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
• body prepares to
defend itself.
•Body grows.
•Body use of energy
Q5 CW 2
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Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
• Large intestine
•Esophagus
•Stomach
•Gland
•Digestive
•Bladder
•Pancreas
•Liver
•Urinary
•Kidney
•Thyroid
•Endocrine
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Unit 3 Lesson 5 How Do Our Bodies Digest Food, Remove Wastes, and Send Messages?
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