Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Take a deep breath in …and out. Feels good, right? And it's also necessary for staying alive. But what ...

The human respiratory system is composed of a network of tissues and organs that enable the body to absorb oxygen from the air as well as expel carbon dioxide and other waste gasses. These functions ...

Múinteoir Clíona's science lesson today was about the respiratory system. The respiratory system is the group of the tissues and organs that work together to allow us to breathe. If you would like to ...

Aerobic respiration needs oxygen, and it produces carbon dioxide as a waste product. The human respiratory system contains the organs that allow us to get the oxygen we need and to remove the waste ...

The cardio-respiratory system works together to get oxygen to the working muscles and remove carbon dioxide from the body. During exercise the muscles need more oxygen in order to contract and they ...

Human beings like other land animals breathe though their nostrils in noses and with the help of lungs. A pair of lungs are located in the airtight thoracic cavity that is bounded by a convex muscular ...