Seamless endothelia as indicators of capillaries developed from sprouts.
D000818:Animals; D000831:Animals, Newborn; D002196:Capillaries / Q000166:cytology*; D004727:Endothelium / Q000166:cytology*; D007413:Intestinal Mucosa / Q000098:blood supply; D007678:Kidney Glomerulus / Q000098:blood supply; D009132:Muscles / Q000098:blood supply; D051381:Rats