Answer:
Carbon's characteristics include its ability to bond with oxygen, hydrogen, nitrogen, phosphorus and sulfur.
Explanation:
Carbon biochemical compounds are essential to all life on the planet. Because of its bonding ability, carbon can form single, double, or triple covalent bonds with other atoms.
Oxygen and hydrogen make up water
Answer:
D. pituitary gland
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The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic). The system is responsible for the flow of blood, nutrients, oxygen and other gases, and as well as hormones to and from cells.
