<span>1. O negative
2. O positive
3. A negative
4. A positive
5. B negative
6. B positive
7. AB negative
<span>8. AB positive</span></span>
<span>I would say
Aldosterone. Adrenal Cortex. Promotes Na+ and H2O retention, secretes K+, maintains BP.
Calcitonin. Thyroid Gland. ...
Epinephrine. Adrenal Medulla. ...
Estrogens. Ovaries/Placenta. ...
Glucagon. Pancreatic Islets: Alpha Cells. ...
Insulin. Pancreatic Islets: Beta Cells. ...
Melatonin. Pineal Gland. ...
<span>Progesterone. Ovaries/Placenta.
And More...</span></span>
Ok well think what one of these sounds like something sticking to another? i belive C