There are five, if the R+M is counted as 1, main vein stems on dragonfly and damselfly wings, and wing veins are fused at their bases and the wings cannot be folded over the body at rest, which also include: Costa (C) – at the leading edge of the wing, strong and marginal, extends to the apex of the wing.
After killing the cock, the assistants offer the heart, one piece of bone, and blood to the gods sitting "above," and feathers, claws, viscera, and apexes of the wing to the malefic spirits sitting "at bottom".
That is the international revolutionary fi ebrand who talks about the 'coming war with the US' for which he has warned his people to prepare; the friend of Cuba's Fidel Castro; and the figure at the apex of the rapid left-wing swing of South America.
For postradiation NPC patients, biopsies on nasopharyngeal skull base regions, such as the petrous apex, great wing of the sphenoid bone, base of sphenoid bone, cavernous sinus, and occipital clivus, are difficult to perform [4], [5].
Because nasopharyngeal skull base lesions occur in deep anatomic sites, such as the petrous apex, great wing of the sphenoid bone, base of sphenoid bone, cavernous sinus, and occipital clivus [5], histopathologic examinations are sometimes difficult to perform in these regions.
The central cusp is found just buccal to the apex of the valley, and two prominent wings of the valley project mesially and distally to the buccal portion of the crown.
In macropterous individuals with wings of normal size, the wings approach or extend beyond the apex of the abdomen.
Uppersurface of wings black.
Selected species are Acroneuria abnormis (Newman) (12 ♀, 7 ♂), Acroneuria carolinensis (Banks) (4 ♀, 5 ♂) (both Perlidae), Pteronarcys californica Newport(6 ♀, 5 ♂), and Pteronarcys princeps Banks (2 ♀, 2 ♂; 1 ♀ with left wings only; 1 ♂ with apex of RFW damaged) (both Pteronarcyidae).
The pointed ends of the leaves meet at the apex of what is basically a cone-shaped device, and the wings are held in place relative to one another by a flexible carbon-fibre ring that connects them.
