Respiratory System

Carbon dioxide and water are a by product of cellular metabolism. They combine to make H2CO3, carbonic acid. This acid circulates in your blood and reaches your cerebral spinal fluid. There are central chemoreceptors for hydrogen ion concentration that monitor the pH level of your cerebral spinal fluid. (the carbonic acid has hydrogen ions) Normally you would exhale these hydrogen ions during respiration. But, you are holding your breath.

The build up of carbonic acid causes your cerebral spinal fluid acid level to lower. The central chemoreceptors for hydrogen ion concentration in your cerebral spinal fluid excite the inspiratory center of the medulla. The medulla exerts autonomic control over the lungs via the inspiratory center. You will inhale when these levels increase to a level where this autonomic control center takes over.

Hope this helps. It's all physiology and chemistry.

The respiratory system provides the mechanism for the body to obtain oxygen and excrete carbon dioxide.

The alveoli

They are used with the Latin genitive of the constellation name, so the leading star in Centaurus is Alpha Centauri ("Alpha of Centaurus")

Src: http://www.skyandtelescope.com/howto/basics/3304511.html

Mucus in the airways helps trap foreign particles to protect the respiratory system. Cilia are tiny beating hairs that sweep the mucus up to your throat where it is either coughed out or swallowed by the acids in your stomach. The cilia are like a janitor who always sweeps up the messes. If these are destroyed, as can occur with long term smoking, the whole thing comes to a halt and you then have to try to cough and pull up this now thickened mess.

it is a nickname for fat people!

What you see is water vapor.

The air that you exhale contains water vapor. When you exhale during a cold day, the relative humidity increases. Relative humidity is actually the percentage of the amount of water vapr in the air. (the maximum amount of water vapor that the air can hold at that temperature) The colder the air, the less water vapor it can carry. When exhaled, air mixes with cold air, the temperature of the exhaled air drops, but there is more water vapor. When the air becomes saturated, (relative humidity is 100%), the extra water vapor will condense, allowing you to see your breathe on cold days.

From my experience, the answer would be no. The only circumstances in which defrag makes any noticeable change in system performance is if it's an old Windows 98 computer with a small hard drive that is almost filled to capacity. Just so you know, I'd consider small less than 10GB. If your system has Windows XP, you're pretty much wasting time by running defrag. It will probably do it's job of moving fragments back to their appropriate space on the disk, but you'll never even notice the difference. :) Goodluck!

A "loogie" is a thick ball of phlegm that forms in the trachea or bronchial tubes, and is coughed up. To cough up a ball of phlegm and spit it out is colloquially called " to hock a loogie" or "hawking a loogie" (from the characteristic sound of expectoration or clearing the throat, and related to the verb "hack" meaning to cough).

During inhalation, the diaphragm contracts and moves downwards, causing the chest cavity to expand and draw air into the lungs. During exhalation, the diaphragm relaxes and moves upwards, allowing the chest cavity to decrease in size and push air out of the lungs. These movements ensure proper ventilation of the lungs.

Am pretty sure its called the pulmonary surfactant that's produced from the lungs

normal respiratory rate is 12-20 breaths per minute

over 20 is called tachypnoea

under 12 is called bradypnoea

a patient in respiratory arrest will need artificial respiration until the cause is identified and treated.

in basic life support you would give 2 rescue breaths to every 30 chest compressions ratio of 2:30

until advance life support arrives

advance life support is the use of a ventalator

In theory, yes. the human can hold its breath underwater for up to five minutes before suffocation or drowning sets in. However, it is hard enough to hold your breath for five minutes out of water. most people can hold their breath underwater for two or three minutes at the maximum