I think the veins absorb the photons because they're located at the top part of a leaf while the stomata that serves as the leaf's lungs are found at the under side.
The event order should be:
1. Ingesting food, the small bowel filled with food solutes and become hypertonic. It will attract water from the blood which is hypotonic
2. Food digested, some of it absorbed. The osmotic pressure inside bowel will be reduced.
3. All food is absorbed, the osmotic pressure reduced significantly makes it hypotonic. The blood attracts water as it is hypertonic. This will increase the blood volume
All/most- ethyl acetate, toluene, aliphatic polyisocyanante, hexamethylene disocyanate, methyl ethyl ketone, dibastic esters, petroleum naphta, bismuth
White - titanium dioxide, zinc
red - iron oxide, cadmium
orange- iron oxide, cadmium
yellow- iron oxide, cadmium
Green - chrome oxide
black- carbon
I got tired of typeing so ----basically they are all made of a pigment which can be a range of chemicals, resin, solvent, and additives. If you are just looking for the main elements in paint, it is silicone, oxygen, and a salt so sodium, chlorine, maybe iodine, or a salt substitute like potassium chloride, potassium nitrate, or calcium hydroxide.