Answer:
Circulatory system
Explanation:
From the right atrium through the tricuspid valve to the right ventricle through the pulmonary sigmoid valve to the pulmonary trunk to the right and left lungs to the capillary beds of the pulmonary veins to the left atrium to the left ventricle of the heart through the mitral valve, to the aorta through the aortic semilunar valve, to the whole body, to the systemic arteries, to the capillaries of the body tissues, to the systemic veins, to the superior cava vein and inferior cava vein, which enter the right atrium of the heart.
When protein enters the stomach, it begins to break down thanks to t<span>iny glands of the stomach which produces juices to help digest food</span>, but only when it enters the small intestine does the protein molecules break down into amino acids.
So the Small Intestine is the answer.
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The correct answer to your question would be Translation, so A, Hope this helps and is correct let me know.
I would say that B) single events or several causes working together to produce extinction in a short period is referred to as mass extinction, but I am not 100% sure.
The radiation from the sun
