Morphological analysis of c-Kit⁺ cells in the head vasculature.

<p>(A) Examples of spherical, quasi-spherical and hemispherical cells localized adjacent to the endothelial layer. (B) c-Kit⁺ cells in the E10.5 (36 sp) dorsal aorta. Blue, orange and white arrows indicate hemispherical, quasi-spherical and spherical cells, respectively. (C) c-Kit⁺ cells in the E10.5 (36 sp) head artery. (D) Frequency of spherical, quasi-spherical and hemispherical c-Kit⁺ cells in the dorsal aorta (n = 179), head arteries (n = 131) and head veins (n = 194). Seven embryos (E10.5, 35–37 sp) were analyzed. Scale bars: 10 μm in A; 50 μm in B and C.