The glands of the endocrine system secrete hormones into the bloodstream to maintain homeostasis and regulate metabolism.
Being around people you like and are good for you
C. A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal.
<span>These bacteria are spread by direct contact with nose and throat discharges of an infected individual or with infected skin lesions. The risk of spread is greatest when an individual is ill, such as when people have strep throat or an infected wound.</span>
