Which type of skin cancer is the most aggressive and difficult to treat?

The discs between the vertebrae are composed of areolar loose connective tissue, which resists compression because of its composition:

The most common, but least dangerous, type of skin cancer is:

The walls of the smallest blood vessels, capillaries, have to allow passage of fluid and solutes from the blood into interstitial/tissue fluids.  This required function explains why they are formed from this very thin type of tissue:

Based on the shriveled appearance of this red blood cell, select each of the following that applies:

The protein fibers that provide an internal framework for a cell are called the:

An alternative membrane name for the skin is:

Keratin is the main protein fiber found in the stratum corneum, and its main function is to provide elasticity to the skin.

Hydrophilic solutes freely pass through the phospholipid bilayer of a plasma membrane.

Plasma membranes are generally impermeable to water.