2, although these dairy products can be stored at room temperature for long period of time, once open, it needs to be refrigerator. Why

The skin includes multiples layers. which of the following is not one of the layers of the skin?

Hepatitis b and hiv/aids are two serious infections that can be transmitted by a. breastfeeding and contact with blood. b. sharing food and sharing drinks. c. transmission by air, water, and shared bodily fluids. d. skin contact, contact with urine, and sharing clothing.

Write a paragraph about why the respiratory system is important and we need to breathe easily. (guys i really need ) x(