Does your chest expand because your lungs inflate, or do your lungs inflate because your chest expands? explai
925762
Your lungs inflate because your chest expands (intercostal muscles flexing) and the diaphram flexes. This creates negative pressure inside the pleural cavity and causes the lungs to inflate (the actions of the chest wall and diaphragm essentially creates a vacuum and air tries to enter through the nasal or oral cavities, to reduce the vacuum)
1114927
Do not do any chest excersizes, that will actually increase the size of the breast by increasing the size of the muscles underneath.  If this is because you have back pain, do back workouts.  And abdominal workouts.  Strengthen the core.  No excersizes shrink the breast size, sorry.
23640
Since you're 16, I would wager a guess these are "growing pains"  if your height is increasing rapidly, however, there is a rare possibility that the muscles in your chest could tear, and you could develop problems breathing, due to something called a pneumothorax.  If the pain becomes severe, or you're having trouble breathing, go to the hospital immediately.
124525
Contraction means it gets smaller, more condensed.  Expansion means it gets larger, less dense.  It usually, but not always, is a function of temperature.  Things generally contract when they get cold and expand when they get hot, due to the amount of space in between the molecules when they are moving faster when they are heated.
838325
Respiration is a process involving inhalation and exhalation of airs.As for inhalation, the muscles that are involved in it is the diaphragm and external intercostal muscles.During inhalation, the contration of diaphragm (lowered to the abdominal) increased the lungs' volume so that the pressure inside the lungs are lower compared to the atmosphere pressure.As for external intercostal muscles, it help by elavating the ribs cage upward(superior) and forward(anterior).The movement that is made is know as Bucket Handle movement.\n\nAs for exhalation, the muscles that are involved in it is the abdominal muscles and the internal intercostal muscles.During exhalation process, the abdominal muscles contrated and pushed the diaphragm upward, squized the lungs(decreasing the lungs' volume).Decrease in volume caused the pressure inside the lungs are higher than the atmosphere pressure and then we exhaled the air out.As for internal intercostal muscles, it draged the ribs cage downward(interior) and backward or inward(posterior).\nThe two muscles involved in exhalation process only participated only if the process is active.Mostly, the exhalation is a passive movement of the ribs cage due to the elasticity of the lungs and the alveolies.\nIf the person exhaling with force,then the muscles will participate in.\n\nHope this helps ya.\n(^^o)/
560650
haha the answer above me is funny...what what exactly do you want to know about it? theres a lot to do with respiration...theres inspiration where the air is taken in..this is caused by a contraction of the diaphragm..thens there structures like the epiglotis, trachea, pharynx...then the oxygen goes to your lungs..where gas exchange occurs in the alveoli's...this is done by some complicated process that i dont understand really..i didnt really pay attention during this part of physiology/biology class. haha. anyway, the oxygen is picked up by the pulmonary artery and goes to the rest of the body through the aorta...uhh, i can think of anything else..hope this helps!
591510
When you move your hand up, your flesh rises and the air that existed above it has been displaced.  There is a void -some free space where you hand was and the displaced particles rush to fill it.  \n\nIt says for every action there is an equal and opposite reaction - it does not say that the object being moved had both reactions.
80795
your lil lungs keep you breathing, right.\nas you gain weight, you put pressure on them, making it harder for them to expand and help pump blood to the heart. ruining everything in your body basicslly
864055
It is the force of your lungs suddenly being deflated due to the force of hitting or being hit very hard. It can be in the stomach region causing the diaphragm to come up, or in the ribs or back causing the air to be forced from the lungs. The worst that ever happen to me was playing touch football. I was the quarterback and was being chased by a girl. I fell in a hole which knocked the wind out of me, then she fell on top of me which made it worse. It took me about 10 minutes to get my breath back to where I could sit, and about a week to get over the bruising from the fall.
740870
That says that you had a good workout.  You may expand your lung capacity by taking long deep breaths and hold as you perform light exercises....
867831
The diaphragm is a muscle separating the thorax, or chest cavity from the abdominal cavity.  It is convex (rounded on top) and when a breath is taken, it flattens out - thereby increasing the space in the chest cavity. (At the same time, the rib cage expands).  When the space in the chest cavity increases, the pressure in the chest cavity decreases in relation to atmospheric pressure....this decrease in pressure is what causes the "breath" to enter the lungs.
552333
The diaphragm almost always works perfectly. When you inhale, it pulls down to help pull air into the lungs. When you exhale, it pushes up to help push air out of the lungs. But sometimes the diaphragm becomes irritated. When this happens, it pulls down in a jerky way, which makes you suck air into your throat suddenly. When the air rushing in hits your voice box, you're left with a big hiccup.
978987
""NO""!!!!! Coughing puts extra Pressure and Strain on the Heart and Lungs. It also constricts the Muscles around the Heart, Chest and Lungs which cause Hypoxia, lack of Oxygen. This is the # one cause of a Heart Attack, Hypoxia. Herbert West III Disabeled Former Paramedic/ACLS-I {Advanced Cardiac Life Support-Instructor}, A.H.A. {AMERICAN HEART ASSOCIATION} CPR-I {CARDIO PULMINARY RECESSITAION-INSTRUCTOR} , Journalist. west.herb@yahoo.com
315055
Yes they do; the more you exercise, the more efficient your pulmonary and cardiovascular systems become, which leads to a greater VO2 Max, or greater lung capacity.
500816
after exercizing your cells need oxygen fast, so your heart pumps faster to get the oxygen-carrying blood circulating better.  you need to breate faster to get the necessary oxygen to your heart.
417764
It's a question of the relative amounts of muscle and fat, together with the density of your bones. Basically, if your overall body density (mass/volume) is >1 you will sink, if it's <1 you will float.\n\nThe air in your lungs *does* make a difference, since taking a deep breath both expands your volume, and increases the amount of low-density stuff in that volume. If I have a lungful of air, I can just about float; breathe out, and I sink.
1090299
Lung\nFrom Wikipedia, the free encyclopedia\n\nThe lungs flank the heart and great vessels in the chest cavity. (Source: Gray's Anatomy of the Human Body, 20th ed. 1918.)\n\nThe lungs flank the heart and great vessels in the chest cavity. (Source: Gray's Anatomy of the Human Body, 20th ed. 1918.)\nAir enters and leaves the lungs via a conduit of cartilaginuous passageways — the bronchi and bronchioles. In this image, lung tissue has been dissected away to reveal the bronchioles. (Source: Gray's Anatomy of the Human Body, 20th ed. 1918.)\n\nAir enters and leaves the lungs via a conduit of cartilaginuous passageways — the bronchi and bronchioles. In this image, lung tissue has been dissected away to reveal the bronchioles. (Source: Gray's Anatomy of the Human Body, 20th ed. 1918.)\n\nThe lung is the essential organ of respiration in air-breathing vertebrates. Its principal function is to transport oxygen from the atmosphere into the bloodstream, and to excrete carbon dioxide from the bloodstream into the atmosphere. This it accomplishes with the mosaic of specialized cells that form millions of tiny, exceptionally thin-walled air sacs where gas exchange takes place. Lungs also have nonrespiratory functions.\n\nMedical terms related to the lung often begin with pulmo-, from the Latin pulmonarius ("of the lungs"), cognate with the Greek pleumon ("lung").\n\nRespiratory function\n\nEnergy production from aerobic respiration often requires oxygen and produces carbon dioxide as a by-product, creating a need for an efficient means of oxygen delivery to cells and carbon dioxide excretion from cells. In smaller organisms, such as single-celled bacteria, this process of gas exchange can take place entirely by simple diffusion. In larger organisms, this is not possible; only a small proportion of cells are close enough to the surface for oxygen from the atmosphere to enter them through diffusion. Two major adaptations made it possible for organisms to attain great multicellularity: an efficient circulatory system that conveyed gases to and from the deepest tissues in the body, and a large, internalised respiratory system that centralized the task of obtaining oxygen from the atmosphere and bringing it into the body, whence it could rapidly be distributed to all tissues via the circulatory system.\n\nIn air-breathing vertebrates, respiration occurs in a series of steps. Air is brought into the animal via the airways — in reptiles, birds and mammals this often consists of the nose; the pharynx; the larynx; the trachea; the bronchi and bronchioles; and the terminal branches of the respiratory tree. The lungs of mammals are a rich lattice of alveoli, which provide an enormous surface area for gas exchange. A network of fine capillaries allows transport of blood over the surface of alveoli. Oxygen from the air inside the alveoli diffuses into the bloodstream, and carbon dioxide diffuses from the blood to the alveoli, both across thin alveolar membranes. The drawing and expulsion of air is driven by muscular action; in early tetrapods, air was driven into the lungs by the pharyngeal muscles, whereas in reptiles, birds and mammals a more complicated musculoskeletal system is used. In the mammal, a large muscle, the diaphragm (in addition to the internal intercostal muscles), drive ventilation by periodically altering the intra-thoracic volume and pressure; by increasing volume and thus decreasing pressure, air flows into the airways down a pressure gradient, and by reducing volume and increasing pressure, the reverse occurs. During normal breathing, expiration is passive and no muscles are contracted.. [\n\nNonrespiratory functions\n\nIn addition to respiratory functions such as gas exchange and regulation of hydrogen ion concentration, the lungs also:\n\n    * influence the concentration of biologically active substances and drugs used in medicine in arterial blood\n    * filter out small blood clots fo