The function of FZD5 (frizzled class receptor 5, ENSG00000163251) is as follows. Receptor for Wnt proteins (PubMed:10097073, PubMed:20530549, PubMed:26908622, PubMed:9054360). Functions in the canonical Wnt/beta- catenin signaling pathway. In vitro activates WNT2, WNT10B, WNT5A, but not WNT2B or WNT4 signaling (By similarity). In neurons, activation by WNT7A promotes formation of synapses (PubMed:20530549). May be involved in transduction and intercellular transmission of polarity information during tissue morphogenesis and/or in differentiated tissues (Probable). Plays a role in yolk sac angiogenesis and in placental vascularization (By similarity). Plays a role in ocular development (PubMed:26908622). {ECO:0000250|UniProtKB:Q9EQD0, ECO:0000269|PubMed:10097073, ECO:0000269|PubMed:20530549, ECO:0000269|PubMed:26908622, ECO:0000269|PubMed:9054360, ECO:0000305}.