Respiratory SystemRespiratory System

Lesson 6 vocabularyLesson 6 vocabularytracheatrachea – the tube through which air moves – the tube through which air moves from your throat to your chest; the windpipefrom your throat to your chest; the windpipe

bronchial tubesbronchial tubes – two branches of the – two branches of the trachea, which go into the lungstrachea, which go into the lungs

alveolialveoli – small, hollow air sacs inside your – small, hollow air sacs inside your lungslungs

inhalation inhalation – is the process – is the process in which the air enters the in which the air enters the lungslungsexhalationexhalation – is the process – is the process in which the air leaves the in which the air leaves the lungslungsbreathingbreathing – moving air in – moving air in and out of the lungsand out of the lungsdiaphragmdiaphragm – is a muscle – is a muscle that separates the chest that separates the chest from the abdomen, helps from the abdomen, helps to also force air out of the to also force air out of the lungslungs

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1. Lesson 6 notes1. Lesson 6 notes1. Organs that 1. Organs that help you breathe help you breathe make up the make up the respiratory respiratory system – draws air system – draws air into your lungs, into your lungs, takes takes oxygenoxygen from from the air for your the air for your body to use, helps body to use, helps remove remove carbon carbon dioxidedioxide

2. How does air travel to your lungs2. How does air travel to your lungs– a. Air comes into your body through your nose and a. Air comes into your body through your nose and

mouthmouth– b. It then enters your throat (pharynx) to your b. It then enters your throat (pharynx) to your

voice box (larynx)voice box (larynx)– c. From this point it moves through a pipe called c. From this point it moves through a pipe called

the trachea, or the trachea, or windpipewindpipe– d. The trachea is divided at the end into 2 d. The trachea is divided at the end into 2

branches called bronchial tubes or bronchibranches called bronchial tubes or bronchi

– e. Air moves into your lungs e. Air moves into your lungs through these tubes, which through these tubes, which branch into smaller tubes branch into smaller tubes ((bronchiolesbronchioles), which lead to tiny ), which lead to tiny air sacs called air sacs called alveolialveoli

– f. In the lungs (sponge like)f. In the lungs (sponge like)i. Air you breathe in fills up the i. Air you breathe in fills up the alveolialveoliii. Oxygen passes from the ii. Oxygen passes from the alveoli alveoli into the into the capillariescapillariesiii. RBC in the capillaries pick up iii. RBC in the capillaries pick up the oxygenthe oxygeniv. Your blood takes the oxygen to iv. Your blood takes the oxygen to the rest of your cellsthe rest of your cells

– g. Deoxygenated bloodg. Deoxygenated bloodi. Blood delivers i. Blood delivers oxygenoxygen and picks up and picks up carbon dioxidecarbon dioxide given off by your cells given off by your cells

ii. Carbon dioxide moves through the body ii. Carbon dioxide moves through the body to the capillaries in the alveoli and into the to the capillaries in the alveoli and into the lungslungs

iii. It then leaves the body when you iii. It then leaves the body when you breathe outbreathe out

3. The breathing process3. The breathing process– a.a. Breathing Breathing – moving air in and out of the lungs – moving air in and out of the lungs– b. Breathing involves both b. Breathing involves both inhalation inhalation and and exhalationexhalation– c. c. InhalationInhalation – is the process in which the air enters – is the process in which the air enters

the lungsthe lungs– d. d. ExhalationExhalation – is the process in which the air leaves – is the process in which the air leaves

the lungsthe lungs– e. Inhalation occurs when the diaphragm contracts e. Inhalation occurs when the diaphragm contracts

and the rib cage expandsand the rib cage expands– f. f. Diaphragm Diaphragm – is a muscle that separates the chest – is a muscle that separates the chest

from the abdomen, helps to also force air out of the from the abdomen, helps to also force air out of the lungslungs

4. How does your body 4. How does your body clean the air you breathe?clean the air you breathe?

– a. Hairs in your nose being a. Hairs in your nose being the cleaning by screening out the cleaning by screening out some particlessome particles

– b. Sticky b. Sticky mucusmucus traps more traps morei. this lines your nasal passages i. this lines your nasal passages and the walls of your trachea and the walls of your trachea and bronchial tubesand bronchial tubes

ii. it may trap germs and other ii. it may trap germs and other harmful matter... like pollenharmful matter... like pollen

– c. Trachea and bronchial tubes have c. Trachea and bronchial tubes have tiny hairs called tiny hairs called ciliacilia

i. Cilia wave quickly back and forth and i. Cilia wave quickly back and forth and push mucus that has trapped dirt and dust push mucus that has trapped dirt and dust up toward your up toward your throatthroat

– d. When you swallow, much of the d. When you swallow, much of the mucus passes into the mucus passes into the digestive digestive systemsystem

Review Lesson 6Review Lesson 6

What does your respiratory system What does your respiratory system do?do?

What is the job of the alveoli?What is the job of the alveoli?

How is the air you breathe cleaned How is the air you breathe cleaned by the respiratory system?by the respiratory system?