Noun. 1. chordate-any animal of the phylum Chordata having a notochord or spinal column. animal, animate being, beast, creature, fauna, brute-a living organism characterized by voluntary movement. Chordata, phylum Chordata-comprises true vertebrates and animals having a notochord.cephalochordate-fish-like animals having a notochord rather than a true spinal column. tunicate, urochord, urochordate-primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva.hordata, phylum Chordata-comprises true vertebrates and animals having a notochord. cephalochordate-fish-like animals having a notochord rather than a true spinal column. tunicate, urochord, urochordate-primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva.
In more than half of all cases, rheumatic fever may affect the heart valves (rheumatic carditis) and interfere with normal blood flow through the heart. Even without treatment, though, only about three people out of every 10 who have a strep throat infection develop rheumatic fever.
Atherosclerosis can affect all of the arteries, but particularly those that supply blood to the heart (coronaries), the neck arteries that supply blood to the brain (carotids), and the arteries that supply the legs (peripheral).