# data[].attributes.body
When we breathe in and out, hairs inside the nose can help us filter the air to make sure the air is moist and clean when it gets in our lungs. And cilia in trachea, bronchioles can “sweep” the dust outside the body and carry the mucus up to our nose and throat.

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The lungs will contract, and the pressure inside the thorax increase, and the volume decrease.

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When we breathe out, our internal intercostal muscles contract and our external intercostal muscles relax. And "push" the lungs back.

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The volume in the lungs start to decrease in the expiration, so the diaphragm relax and moving upwards.

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The air is out of body. The elastic recoil of the alveoli can help our body to force air and the waste out of the lungs.

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(1) When we do expiration, the lungs will return as before, the ribs move downwards and inwards.

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Air get into the lungs, the volume inside the lungs starts to increase and the pressure inside the lungs starts to decrease.

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Our internal intercostal muscles relax, and the external intercostal muscles contract because air get into the lungs and greaten the lungs.

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Because the volume in lungs increase, so the diaphragm moving downward, contracts and “stretch"  .

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(1) When we do respiration, the lungs are expanding, the ribs moving upwards and outwards.

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ventilation:https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=respiration&step_word=&hs=0&pn=2&spn=0&di=79819076150&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=3589568991%2C3747557908&os=944979500%2C1878637361&simid=4169558230%2C859763023&adpicid=0&lpn=0&ln=1546&fr=&fmq=1490176716804_R&fm=result&ic=0&s=undefined&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Fo.quizlet.com%2Fi%2FHrxZmeP-056B3uqltmdDlg.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Fq7tzsjp_z%26e3Bv54AzdH3Fd99nm8cAzdH3F6jfrt6wpt5g-uswfi-vw61fAzdH3F&gsm=0&rpstart=0&rpnum=0

the move of diaphragm
https://image.baidu.com/search/detail?z=0&ipn=d&word=横膈膜&step_word=&hs=0&pn=4&spn=0&di=0&pi=&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&cs=4165048334%2C2581074415&os=1684768589%2C3330719502&simid=&adpicid=0&lpn=0&fm=&sme=&cg=&bdtype=14&simics=1473735394%2C3232435098&oriquery=&objurl=https%3A%2F%2Ftimgsa.baidu.com%2Ftimg%3Fimage%26quality%3D80%26size%3Db10000_10000%26sec%3D1490178038%26di%3Db392058108440970a77c07f1d36905a6%26src%3Dhttp%3A%2F%2Fs7.sinaimg.cn%2Fmw690%2F001ZIWMVzy6N8q7bTamb6%26690&fromurl=ippr_z2C%24qAzdH3FAzdH3Fks52_z%26e3Bftgw_z%26e3Bv54_z%26e3BvgAzdH3FfAzdH3Fks52_8n80jada0a8adez9t_z%26e3Bip4s&gsm=0&cardserver=1
diaphragm:
https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=lungs&step_word=&hs=0&pn=3&spn=0&di=55155972520&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=746288636%2C4137006792&os=1167836426%2C397440486&simid=4286126131%2C670807974&adpicid=0&lpn=0&ln=1988&fr=&fmq=1490180972007_R&fm=result&ic=0&s=undefined&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Fo.quizlet.com%2FeJznW83ndsRiPOX.ijVrQw.png&fromurl=ippr_z2C%24qAzdH3FAzdH3Fq7tzsjp_z%26e3Bv54AzdH3F8lb9ll8aAzdH3Fwgwp54y-riyft5s52y-virf-d-n-uswfi-vw61fAzdH3F&gsm=0&rpstart=0&rpnum=0
inhale and exhale:
https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=&step_word=&hs=0&pn=30&spn=0&di=98620555441&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=1473735394%2C3232435098&os=949431273%2C2128564080&simid=3365930503%2C58499293&adpicid=0&lpn=0&ln=1979&fr=&fmq=1490177697618_R&fm=index&ic=0&s=undefined&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=10&oriquery=&objurl=http%3A%2F%2Fs7.sinaimg.cn%2Fmw690%2F005u36Bkgy6IxBLkZi646%26690&fromurl=ippr_z2C%24qAzdH3FAzdH3Fks52_z%26e3Bftgw_z%26e3Bv54_z%26e3BvgAzdH3FfAzdH3Fks52_8dk0jv89wa8a8u584_z%26e3Bip4s&gsm=0&rpstart=0&rpnum=0
respiration:
https://image.baidu.com/search/detailz=0&ipn=d&word=&step_word=&hs=0&pn=2&spn=0&di=84599172570&pi=&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&cs=3288132624%2C637051907&os=828683026%2C516759505&simid=&adpicid=0&lpn=0&fm=&sme=&cg=&bdtype=0&simics=1473735394%2C3232435098&oriquery=&objurl=https%3A%2F%2Ftimgsa.baidu.com%2Ftimg%3Fimage%26quality%3D80%26size%3Db10000_10000%26sec%3D1490182476%26di%3D6c80ef6c42fa9a2dea0f8b2bcd929556%26src%3Dhttp%3A%2F%2Fs9.rr.itc.cn%2Fg%2FwapChange%2F20149_4_11%2Fa1y3a78997348125520.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3F4_z%26e3Bf5i7_z%26e3Bv54AzdH3FgAzdH3Fdbdnnaa9m9AzdH3F&gsm=0&cardserver=1

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2. What happens when Ventilation occurs in a human 

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2. What happens when Ventilation occurs in a human 

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When ventilation occurs in a human, they use the oxygen they breath in(send them all around the body), and get rid of the waste they don't need such as carbon dioxide and helium.

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During ventilation, we breath in oxygen, little bit carbon dioxide, etc. It's called inhale. When we breath out carbon dioxide water vapor, etc. This can change the volume and pressure in the thorax. Also, internal/external intercostal muscles and diaphragm can help control.