barnett622 on Witty Profiles

beautyistruth 1 decade ago

hi follow for a follow?

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barnett622 1 decade ago

respiratory system moves oxygen from the outside environment into the body
also removes CO2 and H2o from the body

REspiration: process in which oxygen and glucose undergo a complex series of chemical reactions inside cells
release energy that fuels growth and other cell processes
also produces CO2 and HO2 which is eliminated through the lungs

breathing vs respiration
respiration is a chemical reactions inside cells ( Cellular respiration)
breathing is the movement of air into and out of the lungs 
respiration doesn’t take place without circulatory and digestive systems
digestive absorbs glucose from food
circulatory systems carries O2 from your lungs and glucose from food to your cells

Air in the Atmosphere
about 78% nitrogen, 21% oxygen, and 1% includes CO2,HE, and other gases
most of what you breath in is exhaled back into the atmosphere

Path of air
nose, pharynx, trachea, and bronchi
most of air is filtered before it gets to the lungs

NOse
lining of nasal cavity has blood vessels that heats the air some of the cells produce mucus to help moisten the air, keep tissues from drying out, and trap particles
Cilia: tiny hairlike extensions that can move together like whips
sweeps the mucus into the throat when it reaches the stomach everything is killed from stomach acids
some particles stay and make you sneeze

Pharynx: throat ( only part of the respiratory system)
Trachea: windpipe
ridges are rings of cartilage
lined with cilia and mucus
cilia sweep upward to push the mucus towards the pharynx to be swallowed
particles that irritates the trachea cough
food entering the trachea can make you choke

Bronchi and Lungs
Bronchi: the passages that direct the air into the lungs
Lungs: the main organs of the respiratory system
each bronchus divides into smaller and smaller tubes in a pattern that resembles branches of a tree

AlVeoli: tiny sacs of lung tissues specialized for the movement of gases between air and blood
looks like bunches of grapes
covered with capillaries

after air enters an alveolus, oxygen passes through the wall of the alveolus and then through the capillary wall in to the blood
CO2 and H2o pass from the blood into the alveoli
an adults lungs contain about 3 million alveoli
one alveoli opened up has a surface area about 70 square meters ( 3 lanes in a bowling ally )

average day you breath more then 20,000 times
diaphragm: a large, dome- shaped muscle
Rib muscles contract, lifting the chest wall upward and outward while the diaphragm contracts downward (inhaling)
the rib muscles and diaphragm relax, and the chest cavity becomes smaller squeezing air out of air out of the lungs (exhaling)

Larynx: voice box
vocal cords: folds of connective tissue that produce your voice
stretch across the opening of the larynx
vocal cords have a slitlike opening between them and when you speak, muscles make the vocal cords contract, narrowing the opening
the movement of the vocal cords make the air particles vibrate, which creates you voice

the length of the vocal cords produces the low or high tones
contract and shorten= higher voice
longer and relaxed= lower voice

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