If you don't have access to soap and water, which of the following should you use to prevent illness

10. what is one long-term effect of tobacco use? changes in brain chemistry coronary heart disease decreased appetite increased heart rate

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4

1. controls how much sugar is in the blood pancreas 2. controls the other glands pituitary gland 3. manufactured by the brain to relieve pain thyroid 4. gland that regulates the body's energy levels endorphins