Unit 8 Lesson 4 What Body Parts Enable Digestion,
Excretion, and Reproduction?
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Florida Benchmarks
• SC.5.L.14.1 Identify the organs in the human
body and describe their functions, including the
skin, brain, heart, lungs, stomach, liver,
intestines, pancreas, muscles and skeleton,
reproductive organs, kidneys, bladder, and
sensory organs.
• SC.5.L.14.2 Compare and contrast the function of
organs and other physical structures of plants and
animals, including humans, for example: some
animals have skeletons for support—some with
internal skeletons, others with exoskeletons—
while some plants have stems for support.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Down the Hatch
• Food travels through your body until all the useful
parts are absorbed.
• Food travels down a tube called the esophagus.
• The muscular bag that mashes food into a liquid
and mixes the food with digestive juices is the
stomach.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Down the Hatch
• After it passes through the stomach, the liquid
passes to the small intestine.
• The small intestine is a coiled tube that digests
food and absorbs nutrients.
• In the large intestine, water and minerals are
soaked up, leaving only waste.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Down the Hatch
• Identify the esophagus, stomach, small intestine,
and large intestine in the image below.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Down the Hatch
• The liver makes bile that helps break large blobs
of fat into smaller droplets.
• The pancreas makes juices that are released into
the small intestine for breaking down fats and
proteins.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Down the Hatch
• The gallbladder stores bile from the liver and
sends it to the small intestine when food passes
through.
• All of the parts of the digestive system help the
body to absorb important materials from food.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Food for Thought
• Nutrition information on a package label can help
you make healthy food choices.
• The number of servings, Calories, proteins,
carbohydrates, fats, and nutrients are listed.
• Calories are a measure of how much energy your
body will get from food.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Waste Removal
• 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 to urea. Your body
releases this as urine.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Waste Removal
• The lungs are also part of the excretory system.
• Your body produces carbon dioxide as a waste.
• You get rid of carbon dioxide when you breathe
out.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Waste Removal
• The urinary system filters the blood and rids the
body of wastes as urine.
• The kidneys are organs that remove waste from
the blood.
• Kidneys also help to conserve water and keep the
amount of salt in the body balanced.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Waste Removal
• 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 to
the outside of the body.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Waste Removal
• Describe the movement of waste in the urinary
system.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Eating and Excreting
• Living things have different ways of breaking
down nutrients and getting rid of waste.
• How does a cow’s stomach break down grass?
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Cycles of Life
• Animals and plants all have reproductive systems
that make new organisms.
• In humans, male reproductive cells are made in
the testes.
• In humans, female reproductive cells are made in
the ovaries.
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Unit 8 Lesson 4 What Body Parts Enable Digestion, Excretion, and Reproduction?
Cycles of Life
• Reproductive cells can join to produce an embryo.
The embryo grows into a baby.
• Some animals lay eggs that hatch.
• Plants often make seeds for reproduction.
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