- Life Sciences
(also called the carina) in birds is an extension of the sternum (breastbone) which runs along the midline of the sternum and extends outwards, perpendicular to the ribs.
a layer of ozone gas which occurs naturally in the upper atmosphere, and protects life by...
the first part of the intestine, from the pyloric valve of the stomach to the caecum. It...
a substance, usually a liquid, in which other substances can dissolve.