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Filed in Category Respiratory System Review
It’s for the science test review. I don’t get it. 1. which muscle contracts to pull air into the lungs?2.Name the major structures of the human respiratory system. 3.Describe the path of oxygen from outside the body to the alveoli.4. How does oxyget in the alveoli get into the blood? 5.Describbe the structure of the lung.6. What is the function of hairs and mucus in the respiratory passages? 7.What leaves the body with each exhaled breath? (is it carbon dioxide?) Answer as much as you can. Thanks!
3 Comments so far
1. Diaphragm – During inhalation, the diaphragm contracts, reduces pressure in the lungs that sucks air into it.)
2. * Posterior
* Nasal cavity
* Pharynx
* Larynx (voice box)
* Trachea (wind pipe)
* Thoracic cavity ( basically ur chest)
* Bronchi
* Alveoli
This order.
3. As your diaphragm contracts it reduces the air pressure in the lungs and causes a ’suction’ that makes all the air flow into your lungs… through the bronchi etc and to the alveoli.
4. Oxygen gets into the blood via the alveoli. when the concentration of carbon dioxide in the blood near the alveoli is greater than the concentration of oxygen, the oxygen diffuses across the concentration gradient, and the carbon dioxide does the same. You then exhale.
5. The lungs are a pair of sponge like organs in the chest. Within the lungs there are two tubes that go left and right. The bronchi. Each of these bronchi then divide into smaller bronchioles. At the end of bronchioles there is the alveoli, tiny air sacs where the exchange of oxygen and Carbon dioxide takes place.
6. In a normal person mucus in the lungs helps get rid of bacteria and germs in the air that we would normally inhale (people with cystic fibrosis produce too much mucus and it is more viscous than normal
7. Carbon dioxide is the waste gas that leaves the lungs but also a small ammount of oxygen is exhaled aswell (main ones you need to know)
1. Diaphram
2. Lungs, veins, arteries, heart
3. arties – arterolles – capillaries – venuoles – veins – superior vena cava – inferior vena cava – right atrium – tricuspid valve – right ventricle – pulmonary semilunar valve – pulmonary aretery – right and left lung – pulmonary veins – heart – left atrium 0 bicuspid valve – left ventricle – aortic semilunar valve – aorta – all ovver the bodyy
4. absorbd
5. REALLY depends how in depth you want.
6. prevents dust, particles and bacteria from enterng
7. carbon dioxide, some oxygen and some water
i’m too lazy to answer those for you but you could easily get all that information off of google.