11. Which of these are functions of capillaries? (Select all that apply.) absorb oxygen and nutrients
o deliver blood to all cells
carry blood away from the heart
surround alveoli

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system