The answer is c the adrenal glands secrete hormones into the bloodstream
Answer:
The endocrine system.
Explanation:
The endocrine system is the collection of glands that produce hormones that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among other things.
<span>The MMR vaccine is the safest and most effective way to protect your child against measles, mumps and rubella.</span>