They are formed naturally, not organic, solid with a definite volume and shape, have a unique composition, and the atoms are arranged in a pattern called a crystal structure. They are naturally occurring solid, they are made up of a mixture of minerals, smaller rock fragments, organic matter, or glass.
Because they loss more blood than men and it needs to be replaced by another.
Oxygen molecules diffuse fast because the main gas in a cell in Carbon Dioxide its like if it was 99.9 percent carbon that .1 percent is oxygen and carbon dioxide being what it is. Automatically overrides the amount of oxygen. Basically it is nonpolar
They are all rock with different size and shapes and are located in different areas possibly in the same areas but they all have there own unique textures from the photographs and 3 of them look like maybe a fossil of some type of when the dinosaurs where still around and the rocks on the top left corner look smooth and are a small type of igneous rocks. That have been soothed over the years.