- Life Sciences
a ductless gland that secretes hormones directly into the bloodstream, to be transported to where they are needed in the body.
gaps (about 1 micrometre long) that occur between the myelin sheaths generated by consecutive...
cup-shaped sac at the beginning of the nephron, which surrounds the glomerulus.
a microscopic hair-like extension of the cell membrane of the epithelial cells forming the outer...