What’s an example of a living and non- living system

Specialized cells which perform a particular function form : organisms organs tissues

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

The condition in which joints are inflamed is bursitis select the best answer from the choices provided ot f