The most nutrient-dense food source of calcium with high bioavailability is

There is a high level of bioavailability in milk. Calcium in milk is approximately 30-40% The bioavailability of calcium in vegetables is much lower than that of substances that impede its absorption (oxalates, phytates, iron). Spinach provides more than 240 mg of calcium, for this reason, milk as part of dairy, has high bioavailability.

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.

Gucci gang gucci gang gucci gang gucci gang