there is no connection between the size of your head and your femur bone
The bone marking of the femur that articulates with the pelvic girdle is called the head of the femur.
femur
The femur articulates with the coxal bone at the hip joint. This joint is a ball-and-socket joint, allowing for a wide range of movement in the hip. The femur head fits into the acetabulum of the coxal bone.
The fovea capitis is located on the head of the femur bone, specifically on the medial and slightly posterior aspect. It is a small depression that serves as the point of attachment for the ligamentum teres.
* deep socket in the coxal bone* formed where the ilium, ischium, and pubis bones fuse* the head of the femur, the thigh bone, fits in the acetabulumAcetabulum is the area on the pelvis where the head of the femur joins the pelvis. It is a concave surface that allows for the forming of the hip joint which allows you kick your leg up.The hip has these two bowl shaped regions into which the upper femur fits. This is the hip joint. That bowl shaped region is called the acetabulum.
the "thigh" bone is the femur and the "bone of the arm" is the humorus. these bones are very similar to each other. they both have head of the humorus and head of the femur.
acetabulum
They will remove the head of the femur.
acetabulum
One side of the pubis articulates interiorly with the other side of the pubis, joining at the pubic symphysis. Posteriorly it articulates with the sacrum, the Acetabulum proximally articulates with Femur bone. So therefore there are three articulation points for the pelvic girdle.
It is called acetabulum. Acetabulum articulates with round head of femur bone.
It is true that the head of the femur in humans forms approximately 2/3 of a sphere - the remainder of the surface is the neck of the femur, a relatively narrow column of bone that connects the head to the diaphysis of the bone.