AUSTIN, Tex. — The Texas Senate gave final passage on Friday to one of the strictest anti-abortion measures in the country, legislation championed by Gov. Rick Perry, who rallied the Republican-controlled Legislature late last month after a Democratic filibuster blocked the bill and intensified already passionate resistance by abortion-rights supporters.

The bill would ban abortions after 20 weeks of pregnancy and hold abortion clinics to the same standards as hospital-style surgical centers, among other requirements. Its supporters say that the strengthened regulations for the structures and doctors will protect women’s health; opponents argue that the restrictions are actually intended to put financial pressure on the clinics that perform abortions and will force most of them to shut their doors.

Mr. Perry applauded lawmakers for passing the bill, saying, “Today the Texas Legislature took its final step in our historic effort to protect life.” Legislators and anti-abortion activists, he said, “tirelessly defended our smallest and most vulnerable Texans and future Texans.”

Debate over the bill has ignited fierce exchanges between lawmakers and tense confrontations between opponents of the bill, who have worn orange, and supporters of the bill, wearing blue. Signs and slogans have been everywhere, bearing long, impassioned arguments or the simple scrawl on a young man’s orange shirt, a Twitter-esque “@TXLEGE: U R dumb.”