The renal medulla is the innermost part of the kidney. The renal medulla is split up into a number of sections, known as the renal pyramids.Blood enters into the kidney via the renal artery, which then splits up to form the interlobar arteries.he renal medulla is hypertonic to the filtrate in the nephron and aids in the reabsorption of water. Blood is filtered in the glomerulus by solute size. Ions such as sodium, chloride, potassium, and calcium are easily filtered, as is glucose.
Also known as dyshidrotic eczema, the key characteristic of this form of eczema is blistering that is restricted to the hands and feet. Pompholyx eczema is a type of eczema that is usually restricted to the hands and feet.
A: The causes of an itchy rash on the hands and the feet include skin conditions such as dry skin, psoriasis and eczema, according to WebMD. Additional causes of a rash on the hands and the feet include diabetes, allergic reactions and scabies. Continue Reading.