Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
ischium
References
Images
An anatomical illustration of the human hip joint showing bones and ligaments, including the ilium, ischium, pubis, femur, head of femur, and labeled ligaments such as the iliofemoral, pubofemoral, and pubocapsular ligaments.
Britannica AI Icon

ischium

anatomy
Written by
The Information Architects of Encyclopaedia Britannica

The Information Architects maintain a master list of the topics included in the corpus of  Encyclopædia Britannica, and create and manage the relationships between them.
The Information Architects of Encyclopaedia Britannica
Last updated

Quick Summary

An anatomical illustration of the human hip joint showing bones and ligaments, including the ilium, ischium, pubis, femur, head of femur, and labeled ligaments such as the iliofemoral, pubofemoral, and pubocapsular ligaments.
The human hip and pelvis Anterior view of the hip and pelvis, showing attachment of ligaments to the femur, ilium, ischium, and pubis.

The ischium is the lower and back part of the pelvis, one of the three bones that fuse to form each hip bone in mammals. The hip bone, also known as the os coxae or innominate bone, is a large, flaring bone that makes up the lateral half of the pelvis. In adults, the ilium, ischium, and pubis are fused into a single bone. The ischium forms part of the acetabulum, which is the socket that articulates with the femur to create the hip joint. The ischium is also commonly referred to as the "seat bone".1234

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
4 Britannica Sources
  1. hip bone
  2. ischium
  3. seat bone
  4. pelvis: Top Questions

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.