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Circulatory system
The circulatory system is the transport system for endocrine information. While the nervous system uses neurons, the endocrine chemicals and hormones must circulate through the body via blood vessels. Many glands in your body secrete hormones into the blood.
Answer:
because water is important for life
Explanation:
Without water no one can survive in this world especially humans and animals they all need water to survive their lives.
The best and most correct answer among the choices provided by your question is the second choice or letter B. "hydrophilic head."
Phospholipids<span> consist of a glycerol molecule, two fatty acids, and a phosphate group that is modified by an alcohol. The phosphate group is the negatively-charged polar head, which is hydrophilic. The fatty acid chains are the uncharged, nonpolar tails, which are hydrophobic.</span>
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