Semipermeable means the cell membrane can pick and choose what goes out of it and into it. At least, that's what I believe it is.
You may have to enlarge it but here you go!
Explanation:
first blank is; Mitral valve.
2nd blank is; Left Ventricle
The light wave could be absorbed by the object, in which case its energy is converted to heat. The light wave could be reflected by the object. And the light wave could be transmitted by the object. ... When this occurs, objects have a tendency to selectively absorb, reflect or transmit light certain frequencies.
