Lungs

If you exercise 3-4 days a week, your lung capacity grows allowing you to exercise for longer periods of time. When you do an aerobic exercise, your heart and lungs work harder to get more oxygen around the body. Your lungs take oxygen in and then pass it on to your heart which then passes the oxygen onto your blood vessels to circulate the oxygen around the body. The oxygen is usually taken to the muscles in the limbs (Arms and Legs) to help keep them moving.

The elastic fibres recoil after the alveoli contract during expiration. The surfactant on the inner surface also helps to stop the alveolar walls 'sticking' together which will stop air from coming due to the pressure not being able to decrease

The carbon dioxide is exhaled.

terminal bronchioles

Your skin and your mucus membranes are your body's first line of defense against any pathogen whether that be dust, or a virus!

Cancer is not congenital. It is very rare for a child to get cancer, and even more rarely developed in the first stages of life.

The heart is the pump that circulates blood throughout the body. The body itself does not actively push the blood along by any means, though there are one-way valves in the veins where the pressure is lower. Ultimately the deoxygenated blood reaches the heart due to the pressure of the blood behind it, constantly being pumped forward by the heart.

Mediastinum. That is the cavity that contains the heart.

Yes Lung cancer makes it extremely hard to breathe!

The right side of the heart (right atrium and right ventricle) receives blood low on O2.

Worst case scenario you get a bubble of air in your vein (called an embolism) which travels to your heart or lungs, and due to a complicated process involving gas pressures and such, you die. Of course the likelihood of being accidently injected with enough air to cause real harm is quite small. Most bubbles of air will simply be absorbed into your blood stream, and you will go on to have a happy, oblivious life.

This is part of breathing in, or inspiration. The trachea splits into the two bronchi (singular: bronchus) one of which goes to each lung.

The alveoli in the lungs.

Yes, alligators have lungs and breathe air just like you do. They CAN hold their breath for a long time while they are under water, though!

no

I cannot say for certain because I am not a doctor. But I had been a serial sneezer for some years before being diagnosed with lung cancer last August (2011). I initially consulted my doctor because I kept feeling feverish, especially in the evenings. The symptoms were rather like those associated with a bad cold or flu - including a persistent cough, which I put down to quite heavy smoking for nigh on forty years. So I requested a blood test which showed I had some kind of 'inflammation' in my body. 'Inflammation of chronic disease'; they called it. This led to an X-Ray, CT scan and PET scan which confirmed 'an abnormality' in my right lung. They did a bronchoscopy but could not find any cancer cells. 'Just dead tissue -- like the rotten part in the middle of an orange,' explained the consultant.

Nevertheless, 'the team' had a meeting and decided to give me an intensive course of radiotherapy (one session every day for twenty days). No big deal per se, apart from a slight sore throat and difficulty swallowing, which began towards the end of the treatment and lasted a few weeks. Sucking strong mints was a great help. The worst part was getting to the hospital and back first thing in the mornings. I could have stayed in the hospital. But I didn't fancy that at all. Anyhow, after the last treatment I felt as fit as a fiddle and three months later another CT scan and X-Ray showed that the 'abnormality' had shrunk somewhat.

Right now I am still feeling better than I've felt for years, but am still sneezing several times at the one go, just as I was before. I get these sneezing fits every few days. So did my poor dad, who sadly fell victim to lung cancer several years ago. But he was much older than I am now and had lots of other things wrong with him too, including diabetes. Our neighbour next door was also a serial sneezer and also died from cancer, of the prostate. He was even older than dad - in his mid-eighties.

However, since having my treatment I am exceedingly well and eating like a horse. Fingers crossed.

This is the extent of my experience regarding the question asked. On an academic level I do believe that persistent sneezing could be a sign of cancer. I think this because of my family experience and the fact that the cancer I was diagnosed with was producing 'virus-like' symptoms (runny nose/fever) similar to those produced by other virus-induced illnesses, like the common cold and influenza etc. As most biology students know, all viruses have to do three things to ensure their survival:

1. Get into (infect) a host organism;

2. Replicate within the host organism;

3. Get out of the host organism (sneezing/diarrhoea/mucus) to infect other organisms.

But my 'virus angle' re cancer is just that of a layman. For a qualified view you need to consult an oncologist.

They say that the secret of surviving lung cancer, or ANY cancer, is to get it diagnosed as early as possible. This means that, if you think any symptoms you have could be cancer-related, you MUST see your doctor without delay. Internet advice is all very well, but there's no substitute for professional medical care. Seriously!

I hope this has been helpful and that everything turns out well for you.

Well. when your lungs get shoved up your butt hole it hurts kinda bad, so i would assume negativly, i touch myself Joseph Bonds

The size of a sheep's lungs are ultimately dependent upon a number of factors. Some of those factors include the weight, age, and health of the sheep.

nope.. the trachea

The right lung has three lobes.

I had stage one cancer of the inner and out cords of the larynx and received surgery and 37 direct beam radiation treatments over a period of 3 1/2 months.. This was in May of 2005. I will reach my 5 years in May of 2010. I am cancer free.

the respiratory system since that is where your lungs are located

the spine is lateral to the lungs