21d Accent placed over a vowel to indicate that it is short or unstressed.(5) (b?e?e) 23d Giant evergreen ash tree in Scandinavian mythology whose roots and branches bind earth,(Midgard), heaven (asgard) and hell (Niflheim) together.(9)(y??dr???l)24d Any long-snouted mammal of the family Myrmecophagidae of the Central ans South America, M.tridactyla and related Species.(8) (?n?e??e?) 27d Tactical artillery unit comprising two or more troops, equivalent to a cimpany in an infantry regiment.(7) (??t?e?y) 28d Ductless vascular organ of the upper left abdomen that regulates the number of red blood cells in circulation, stores iron and helps to process lymphocytes.(6) (?p?e?n)