Mecanismo de transporte celular que permite la entrada del oxigeno qur viaja por la sangre hasta los alveolos de los pulmones

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi, r^3 , where r is the sphere’s radius.

What causes darkening of the skin as melanin production increases

Each nephron is made up of capillaries that form the __ sweat glands bladder glomerulus ureter