Why is the outside lining of the lungs lubricated?

Can you tell the size of a woman's coxal bone by observation?

John is jogging on a winter day. the outdoor temperature is 31° f. yet his body temperature is 98°f. which term best describes the process causing this difference in temperature?

Ava has an important exam coming up for which she feels unprepared. what is the best way for ava to relieve her stress about the exam? question 17 options: indulge in a little more coffee than usual to increase her concentration on the day of the exam. limit her time spent thinking about the exam and focus on leisure activities. spend extra time relaxing, sleeping, and watching television in the days leading up to the exam. manage her time by setting up a study schedule for the week prior to the exam.