Slide 1 Slide 2 Oxygen (O2) is a gas. It has no taste, odor, or color. Oxygen is needed for life. Every cell needs oxygen. The respiratory and cardiovascular systems must…
Chapter 28 Oxygen Needs Chapter 30 Oxygen Needs Oxygen (O2) is a gas. It has no taste, odor, or color. Oxygen is needed for life. Every cell needs oxygen. The respiratory…