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(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.
organisms that feed on dead organic matter and thereby release nutrients back into the soil.
an organism's ability to regulate or maintain its own body temperature.
specialised cells which secrete mucus, usually found together with columnar epithelium and...
when a person uses their breath to help another person who has stopped breathing, in an attempt...
an infectious disease of the digestive system that is characterised by diarrhoeaandbloodinthe...