GD Second Timers: Bones 3 (E-H)

Collagen molecules are found throughout the clear cornea of the eye.

The reason that you can see through the clear cornea is because the collagen molecules are criss-crossing each other.

Without collagen “steel-cables” in blood arteries, one pump of the heart would blow out the blood piping in many places.

The blood “pipes” shown below feed the liver cells.

The red fibers below are collagen fibers that make the skin springy. The yellow fibers in the skin here are elastin which make the skin tough. (See diagram and info in article. This is tricky.)

Elastin protein helps make skin and tendons elastic.

The placement of collagen molecular-cables in skin is like having steel threads that are really, really tiny woven here and there throughout super-soft skin.

Did the doctor in the skin care article say that the collagen and the elastin molecules in skin care products are far too large to penetrate the skin?

As you get older, the number of collagen and elastin proteins in the skin grow. This causes the skin to bunch up and wrinkle.

Jumping kangaroos store 70% of their energy in their tendons, compared to running humans, who can store and reuse only about 20%.

Kangaroo tendons have no nano-crystals like bones do.

Kangaroos can jump 50 feet!