Coccyx - Wikipedia
In tailless primates (e.g. humans and other great apes) since Nacholapithecus (a Miocene hominoid), [2][3] the coccyx is the remnant of a vestigial tail. In animals with bony tails, it is known as tailhead or dock, in bird anatomy as tailfan.
Bonytail - U.S. Fish and Wildlife Service
2022年3月13日 · The bonytail is the rarest of the endangered, native fish of the Colorado River and is thought to have evolved around 3 to 5 million years ago. Its name describes the fish as an elegant swimmer and member of the chub group of minnows. Bonytail were once common in portions of the upper and lower Colorado River basins.
Bonytail chub - Wikipedia
Bonytail chubs have bodies that sometimes arch into a smooth, predorsal hump (in adults). While their skull is quite concave, their caudal peduncle (tailside) is thin, and almost looks like a pencil (hence, "bony tail").
Coccyx (Tailbone): Anatomy, Function & Common Conditions - Cleveland Clinic
2024年1月17日 · It’s a small, curved bone that’s made of between three and five vertebrae fused together. Most people know the coccyx as the tailbone. It supports your weight and helps you keep your balance when you’re sitting down. Tailbone pain …
Coccyx: Anatomy, Function, and Treatment - Verywell Health
2022年4月8日 · The coccyx is colloquially referred to as the tailbone. It is a small bone of four fused vertebrae that would make up the tail if humans had one.
Anatomy of the Coccyx (Tailbone) - Spine-health
The coccyx is a triangular arrangement of bone that makes up the very bottom portion of the spine below the sacrum. It is the final segment of the vertebral column and represents a vestigial tail, hence the common term tailbone.
Tailbone pain: How can I relieve it? - Mayo Clinic
2023年4月21日 · Tailbone pain is pain in or around the bony structure at the bottom of the spine. This part of the spine is called the coccyx. Tailbone pain is sometimes called coccydynia or coccygodynia.
Bonytail chub - Facts, Diet, Habitat & Pictures on Animalia.bio
The bonytail chub or bonytail (Gila elegans) is a cyprinid freshwater fish native to the Colorado River basin of Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming in the southwestern United States; it has been extirpated from the part of the basin in Mexico.
Coccyx: What Is It, Function, Injuries, and More | Osmosis
2023年4月3日 · The coccyx, or tailbone, is a small triangle-shaped bone derived from the fusion of four coccygeal vertebrae at the end of the vertebral column. It represents the embryonic remnant of the caudal eminence, a tail-like structure found in …
Coccyx (Tailbone) – Anatomy, Location, Functions, & Diagram
2021年12月31日 · It is usually composed of four vertebrae (Co1- Co4), which fuse to produce a triangular shape, resembling a shortened tail. As it is the remnant of the vestigial tail, it is commonly known as the tailbone. The coccyx is one of …