354605.fig.004a
(a)
354605.fig.004b
(b)
354605.fig.004c
(c)
354605.fig.004d
(d)
Figure 4: Transmission electron micrographs showing exosomes (75 nm diameter; Exo. (a)) and microvesicles (200 nm diameter; (b)) secreted by cardiac progenitor cells (CPC) in a human CS in vitro. Exosomes in adult mouse myocardium ((c)-(d); TC: telocyte; ESC: extracellular space).