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Lungs

Lungs are a pair of elastic and spongy organs that help the body breathe. They are present inside the rib cage in thoracic cavity of humans.

3,922 Questions

How many Percent of lung cancer in the US is caused by tobacco use?

Smoking causes 90% of lung cancer in men and 80% lung cancer cases seen in women in U.S.

What circulation transports deoxygenated blood to the lungs to get oxygen?

Blood travels to the lungs because it is not oxygenated and it will become oxygenated in the lungs, since that is what the lungs are for. The pulmonary artery takes blood to the lungs, and the pulmonary vein takes blood from the lungs back to the heart, from whence it is pumped throughout the body.

How body alters air pressure in lungs?

By putting pressure on the lungs with the diaprhragm (a platform of muscles just below the lungs.

What change occurs in the lung capillaries?

When the blood is pumped through the pulmonary artery to the pulmonary capillaries The Oxygen diffuses across the alveolar-capillary membrane and is absorbed by the hemoglobin in the red blood cells.

That's the simple form. There are 4 Heme groups in each cell(heme is the iron containing substance that binds with oxygen). The first, second and third group saturate rather rapidly achieving a 75% saturation. The last group saturates at a slower rate simply because of the diffusion gradient and normally stops combining with oxygen at around 21% giving you a total of 96% saturation. This is why hemoglobin is so important. This saturation is effected by things like the patient's body temperature, the pH of the blood, the amount of hemoglobin available etc.

The oxygen content of the blood reaching the Pulmonary Veins is also effected by gravity. If the patient is upright most of the circulation goes to the bases of the lungs and the least amount of blood gets to the apices. The middle portion of the lungs gets just the "right" amount. This is important because the air ventilating the lungs goes preferentially to the apices and less to the bases. So you can see there is a mismatch in the bases and in the apices. But in the middle there is just the right matching. That is if the patient is upright. If they are lieing down the blood flow goes preferentially to to the lowest point. This whole thing is called the Ventilation/perfusion ratio. This is a very important concept when you are thinking about how a disease entity eg. pneumonia, effects the patient's Blood gases.

The other change that takes place is the exchange of CO2 that regulates the pH of the blood. CO2 is carried in the blood in combination with H2O. This forms carbonic acid. The carbonic acid is balanced by HCO3 and the result of the matching of the two results in the hydrogen ion concentration or simply, the pH. To explain the whole chemical process would be lengthy so I'll just leave it at that.

So the blood that has gone through the lungs has changed two basic ways. It has collected Oxygen to deliver to the tissues and it's had it's pH regulated so metabolic processes can go on normally.

I would explain how the pH is regulated in more detail at another time. Also, you should look up the Oxy-hemoglobin dissociation curve.There is a world of knowledge out there.

What is the passage that directs air to the lungs?

Bronchus principalis=>bronchi lobares=>bronchus segmentalis=>bronchiolus terminalis=> bronchiolus respiratorius=>ductulus alveolaris=>sacculus alveolaris=> alveolus

i hope that you don't mind latina terminology.

What branch of science does cancer fall in?

Oncology is the branch of medicine that focuses on cancer.

There are millions of alveoli in the lungs they provide a very large surface area why is a large surface area necessary?

By having millions of these tiny sacs, the surface area of the lungs is vastly increased. This adaprtation enables a greater volume of air to breathed in, in each breath. An increased surface area allows for more diffusion to take place between the lungs and the blood.

What system is the lungs in?

The lungs are the major organ in the respiratory system, which also includes the nerves, airways and blood vessels that serve them.

How can you get prostate cancer?

There are many factors contributing to prostate cancer:

1 - hereditary

2 - dietary habits

3 - lifestyle habits

4 - male hormones

which increase the risk to get prostate cancer.

The color of lungs?

When you slice a section of lung the inside surface is bright pink and has a soft spongy texture.The holes in this 'sponge' are much smaller than you would imagine. In smokers, old miners etc this, unfortunately, is not the case. If you have ever tried to burn an old pair of leather boots and failed you will know what I mean. TAKE HEED!!

Is the lung a main organ?

What are the main organs of the intergumentary

How long is bronchiolitis contagious?

The incubation period of the common cold is typically 36 to 48 hours, but, in some cases, symptoms can arise within 12 hours, or slightly less, of catching the virus. From the time a cold virus enters the nose, it takes 8-12 hours for the viral reproductive cycle to be completed and for new cold virions to be shed (released) in nasal secretions. This time period is called the "incubation period".

However, the incubation period differs depending on the specific common cold virus involved and the individual infected. There are over 200 viruses responsible for the common cold. According to the US Centers for Disease Control and Prevention (CDC), the incubation periods for a few of the most common causative viruses involved with the common cold are:

Rhinovirus: 2-7 days.

Coronaviruses: 2-10 days.

Adenoviruses: 2-14 days.

Respiratory Syncytial Virus (RSV): 2-8 days

Cold symptoms can also begin shortly after new virus particles are first produced in the nose (10-12 hours). The time from the beginning of the infection to the peak of symptoms is typically 36-72 hours. Adults can be infectious beginning a day or two before feeling any symptoms. Some people never develop symptoms even if infected allowing for more unknowing spread of the disease. The most contagious period is typically on the third day following initiation of symptoms.

Which side of the lungs has 3 lobes?

The left lung has only two lobes and the right has three.

What are the small sacs at the end of the bronchi-oles where gas exchanged occurs called?

In the pulmonary system, the Alveoli are the small sacs at the end of the bronchioles which are connected to the bronchus. It is within these sacs that gas exchange occurs.

What tissues make up the bronchi?

wall consists of collagenous connective tissue with thin interlacing bundles of smooth muscle and elastic fibers

Histologically, the distal bronchioles have connective tissue and smooth muscle in the airway walls but do not have submucosal glands or cartilage. The epithelium of the terminal bronchioles is composed of three types of cells - ciliated cells, nonciliated cells and a few basal cells. The epithelium of the respiratory bronchioles has three cell populations. The first near the terminal bronchioles consists of the nonciliated columnar, ciliated columnar and basal cells. The second consists of nonciliated cuboidal cells. The third is most similar to the alveolar epithelial lining. These are nonciliated cells, cuboidal type II cells, and squamous type I cells.

refer: Gary R. Epler, M.D. (2009), Bronchiolar Airway Disorders and Bronchiolitis Obliterans, dynamics of disease, retrieved 04/05/09 http://www.epler.com/boo5.html

W. J. Krause (2004) ,The Art of Examining and Interpreting Histologic, pg 64

What is different about your left lung and your right lung?

There is no middle lobe on the left lung and the right lung is shorter than the left lung.

Differences between Left & Right Lungs

Right Lung

Left Lung

Heavier (625 gram)

Lighter 565 (gram)

Shorter & wider due to upward

compression by liver

Longer & narrower due to side

compression by heart

Has oblique & horizontal fissure

Has only horizontal fissure

Consists of 3 lobes: Upper,

middle & lower

Consists of 2 lobes: upper &

lower

Base more concave by liver

compression

Base less concave

Anterior border is complete

Anterior border shows

Cardiac notch

Lingual (at 6th costal cartilage)

Hilum contains two bronchi:

Eparterial

Hyparterial

Hilum contains one bronchus

only

Hilum contains one bronchial

artery only

Hilum contains two bronchial

arteries

http://www.scribd.com/doc/28759512/Differences-Between-Left-amp-Right-Lungs

Right lung

Left lung

Heavier

Lighter

Shorter & wider due to upward compression by liver

Longer & narrower due to side compression by heart

Has oblique & horizontal (transverse) fissure

Only has oblique fissure

Three lobes: upper, middle, and lower

Two lobes: upper and lower

Base more concave by liver compression

Base less concave

Hilum: 2bronchi, 2pulmonary arteries, and 2 pulmonary veins

Hilum: one bronchus, 2pulmonary arteries, and 2 pulmonary veins

What is carbon dioxide carried to the lungs as?

oxygen. You breathe out carbon dioxide and you breathe in oxygen it is all oxygen in you body its hoe it comes out

Why are lungs important?

Lungs contain avleoli ( little air sacs) where oxygen is relased into capillaries(veins that carry blood). The blood becomes oxygenated and then travels to the heart to be pumped throughout the body.

They supply the body with oxygen and remove carbon dioxide.

Does oxygenated blood come from your body or lungs?

Oxygen travels into the smallest air sacs of the lungs, called alveoli. Capillaries around these air sacs allow blood to exchange oxygen for unwanted carbon dioxide. The oxygen-rich blood then returns to the heart to be pumped to the rest of the body. The carbon dioxide in the lungs is passed out of the body through the mouth and nose when we exhale.

So basically, your lungs have deoxygenated blood while the body has oxygenated blood.

What animal has the best lungs?

Every animal have Lungs will tell me something how do you think the Animal can breath for example people breath from the lungs and if you dont take care of breathing you may have asthma

Why are the lungs pinkish red?

Lungs are pink in color because they are full of oxygen rich blood. Oxygen poor blood, on the other hand, has blue color to it.