Beyond helping with reinflation, what function does residual CO2 serve?

Which of the following is an argument against buying local fruits and vegetables?

Adoctor is trying to diagnose a woman with the following symptoms: issues with the heart and lungs, a skin rash, and issues with the joints. what autoimmune disorder will the woman most likely be diagnosed with? a. arthritis b. lupus c. grave’s disease d. allergies

What provides the smooth surface for the movement of bones at joints?