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the structure that separates the right ventricle from the pulmonary artery. It prevents the blood from flowing from the pulmonary artery back into the left ventricle during the general diastole phase of the cardiac cycle.
tissue that binds organ components and organs together and supports structures of the body.
(also called physical digestion) the breaking down of food into smaller pieces using mechanical...
the process whereby useful molecules, such as glucose and amino acids, as well as water and...
the parts and processes of the body that recognise and fight pathogens, such as viruses and...
ecotourism that is carried out thoughtfully, morally and in a way that is acceptable to all...