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Firstly, the intercostal muscles contract. This causes the ribcage to move upwards and outwards. The diaphragm also contracts. This all has the combined effect of increasing the volume of the lungs. As a res...

Sin duda, hay muchos peligros de fumar para la salud. Uno de los peores peligros es el riesgo del cáncer de los pulmones. Fumar cigarillos produce un riesgo mayor de enfermedad de los pulmones y aumeta la pr...

When the balloon is rubbed on your head, it becomes electrostatically charged (this is because electrons are transfered to/from the balloon from/to your hair). When you bring the balloon, which now has an ex...

The control of different substances in the body keeping them at a stable equilibrium level is called homeostasis. One area of this is blood sugar level control, if blood sugar level is too high or too low th...

Opinions on ethical issues such as abortion will very from church to church and Christian to Christian, however the bible contains a number of teachings that may be interpreted as relating to the issue of ab...