5 vocabularyword!respiration – the transport of oxygen from outside the body to cells and tissues, and the transport of carbon dioxide and wastes away from cells and to the environment.
6 Why do we Breathe?vocabularyword!cellular respiration - (break down of glucose for energy) requires oxygen as a reactant.Respiration also produces water and carbon dioxide which can leave the body through the lungs
7 The Air You Breathe The air you breathe comes from the atmosphere 21% oxygen78% nitrogen1% other gasesYour body does not use most of the air you inhaleWhat you don’t need is exhaled
8 The Path of AirAs air moves the organs, it is warmed, moistened, and bacteria and other small particles are removed.
9 In the nose … Air is warmed Nose hair filters dust and other small things out.Mucus also traps small particles, dust, and bacteria.
11 the pharynxvocabularyword!pharynx - (throat) is a long hollow tube that connects the nose to the trachea.
12 the larynxvocabularyword!larynx – part of the throat where the vocal cords are located.
13 the tracheavocabularyword!trachea - connects the pharynx to the bronchi. It is lined with mucus and small hairs that trap particles.You can feel the ridges of the trachea by running your finger down your neck
14 bronchi bronchi - passages that direct air into the lungs. vocabularyword!bronchi - passages that direct air into the lungs.Left bronchus goes to the left lungRight bronchus goes into the right lung
15 the lungsvocabularyword!lungs - The main organs of the respiratory system that provide oxygen to the body.The bronchi, bronchioles, and alveoli are all inside the lungs.
17 bronchiolesvocabularyword!bronchioles - smaller branches that come off of the bronchi.
18 alveolivocabularyword!alveoli - smallest structure in the lungs where gas exchange takes place between the lungs and the blood.The walls of the alveoli are very thin which allows the gases to diffuse back and forth.
20 Gas ExchangeAfter air enters the alveoli, oxygen passes through the wall of the alveoli, into the capillary that surrounds it , then into the artery headed to the heart.At the same time, carbon dioxide and water pass from the vein into the capillary, then into the alveoli where they are exhaled.
22 diaphragm – dome-shaped muscle below the lungs that causes us to inhale and exhale. vocabularyword!
23 How You Breathe You breathe on average 20,000 times a day Breathing speeds up when you exerciseBreathing slows down when you are asleepBoth involuntary and voluntary muscles and nervous system helps you breathe
24 Speaking Inside your trachea are vocal cords Vocal cords stretch across the openingYour vocal cords work like the neck of a balloon when it is stretchedAir passes over the vocal cords, making them vibrate which produces soundLow – vocal cords contract & shortenHigh – vocal cords relax & lengthen
25 Body systems that work with the respiratory system; muscular system to pull air into the lungscirculatory system to carry the oxygen in and carbon dioxide outdigestive system to provide energy