Answer:
Blood,
the red liquid that circulates in the arteries and veins of humans and other vertebrate animals, carrying oxygen to and carbon dioxide from the tissues of the body.
oxygen,
a colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.
circulatory,
relating to the circulation of blood or sap.
respiratory,
relating to or affecting respiration or the organs of respiration.
hert,
a hollow muscular organ that pumps the blood through the circulatory system by rhythmic contraction and dilation. In vertebrates there may be up to four chambers (as in humans), with two atria and two ventricles.
Step-by-step explanation:
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