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breathing is when animals convert oxygen into carbon dioxide
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air is a part of the environment
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breathing is when animals convert oxygen into carbon dioxide
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if something is required by something else then that something must be provided to that somethign else
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breathing is a process in animal respiration
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some environments contain waste
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breathing out is when animals expel carbon dioxide from their lungs into the air
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if something is expelled in a process, then that something is a waste product of that process
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waste must be removed
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animals require respiration to survive / use energy
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blood is a vehicle for carrying oxygen from the lungs to the rest of the body
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circulation the circulatory system transports blood throughout the body
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the respiratory system takes in oxygen from the air
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the respiratory system transfers oxygen to the circulatory system
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cells are a part of the body
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maintaining homeostasis requires respiration
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the muscular system contains muscles
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breathing out is when animals exhale carbon dioxide from their lungs into the air
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tightening muscles in the chest can be used to exhale
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the lungs are a part of the respiratory system
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the lungs are a part of the body of an animal used for breathing air
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the respiratory system performs respiration
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photosynthesis makes energy for the plant by converting carbon dioxide, water, and sunlight into carbohydrates
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living things require respiration to use energy
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if something releases something else then that something is the source of that something else
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if something is required to use something else then that something is a source of that something else
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carbohydrates are used for storing energy
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smoking is a kind of method for inhaling smoke
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harming something has a negative impact on / effect on that something
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a lung is a kind of internal organ
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if something harms something else, then that something also harms the parts of that something else
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to inhale means to breathe in
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smoke is a kind of gas
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internal organs are a part of the body
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damage has a negative impact on a thing
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when a lung breathes in air the air goes directly to the lungs
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smoking harms the body
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air contains gasses
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a lung is a kind of organ for breathing air
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red blood cells contain hemoglobin
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hemoglobin is a kind of protein that carries oxygen
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blood is made up of blood cells
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blood is a vehicle for carrying oxygen from the lungs to the rest of the body
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red blood cells are a kind of blood cell
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red blood cells carry oxygen
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to transport can mean to carry
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transporting is a kind of function
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veins carry blood from the body to the heart
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arteries carry blood from the heart to the body
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the circulatory system transports blood throughout the body
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the circulatory system carries food from the digestive systems to the whole body
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food contains nutrients for living things
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blood is a part of the circulatory system
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digestion is when food is absorbed into the blood stream
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food contains nutrients for living things
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cells are a part of the body
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the circulatory system transports blood throughout the body
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blood is a part of the circulatory system
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digestion is when food is absorbed into the blood stream
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the digestive system digests food for the body
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food contains nutrients for living things
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the circulatory system transports blood throughout the body
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the circulatory system transports blood throughout the body
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food is a kind of substance
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nutrients are a kind of simple substance
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blood is a vehicle for carrying substances
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the breaking down of food into simple substances occurs in the digestive system
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digestion is when food is absorbed into the blood stream
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cells are a part of the body
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food contains nutrients for living things
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the circulatory system transports blood throughout the body
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the digestive system breaks down food into nutrients for the body
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the digestive system digests food for the body
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blood is a part of the circulatory system
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digestion is when food is absorbed into the blood stream
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transporting nutrients, water, and minerals is a kind of function
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if two things perform the same function then those two things are similar
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arteries / veins transport nutrients / water / minerals to the whole body
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the body of an animal contains arteries / veins
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special tissues in plants transport food / water / minerals throughout the plant
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a stem is often a part of plant
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arteries / veins transport nutrients / water / minerals to the whole body
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a plant / living thing requires nutrients to grow
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the body of an animal contains arteries / veins
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special tissues in plants transport food / water / minerals to other parts of the plant
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a plant stem contains a system of tubes for transporting water and nutrients to other parts of the plant
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an animal / living thing requires nutrients for survival
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arteries / veins are parts of a body
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digestion is when stomach acid breaks down food
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nutrients are simpler than food
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a body is a part of a living thing
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food contains nutrients for living things
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nutrients are a kind of substance
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if something is made of something else then that something can be broken down into that something else
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the digestive system digests food for the body
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if something is made of something else then that something contains that something else
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the digestive system digests food for the body
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if something is made of something else then that something can be broken down into that something else
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if something is made of something else then that something contains that something else
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digestion is when stomach acid breaks down food
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