Which of these vessels receives blood during ventricular systole? a) both the aorta and pulmonary trunk b) aorta only c) pulmonary arteries only d) pulmonary veins only

a. both the aorta and pulmonary trunk

Explanation:

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hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds