Where does diffusion of oxygen and carbon dioxide take place in the lungs?
a. alveoli and capillaries
b. bronchi and thorax
c. cilia and pleura
d. epiglottis and larynx

Which skill, if it cannot be performed by a 3-year-old child, should alert the nurse that the child may be developmentally delayed?

Four types of motile cells in human body?

Which of the following would be a body response when stepping outside without a coat on a snowy day? a. senaceous glands. secrete more senum b. more liquid is transported by the body to the skin fir insulation c. blood vessels in the skin narrow and contract d. blood vessels in the skin expand