pelvic bone

Question 1

pelvic girdle

Answer 1

the pelvic bone is made from the sacrum and the two coxyl bones which are the hips.

Question 2

pelvic

Answer 2

Together, the pelvic girdle (which includes the two coxal bones and the sacrum) plus the coccyx form the pelvis.

Question 3

how is the pelvc girdle attached

Answer 3

The pelvic girdle is strong and stable, and it connects to the axial skeleton through the sacrum, which in turn is attached to the 5th lumbar vertebra (L5) of the spine.

Question 4

how the femeur attaches to the coxxal

Answer 4

The acetabulum is the socket in the hip bone that holds the head of the femur (ball).
It’s tightened and stabilized by ligaments, making the hip joint very secure and weight-bearing.

Question 5

the purpose of the pelvic girdle

Answer 5

The pelvic girdle is like a strong bowl that both holds up the body and protects the organs inside it.

Question 6

illium

Answer 6

The ilium is the largest part of the hip bone.
It has a flared shape, like a peacock’s tail, and it connects posteriorly to the sacrum at the sacroiliac joint.

Question 7

illiac crest

Answer 7

This is the top edge of the ilium.

It’s a major anatomical landmark — important for:

Muscle attachment

Intramuscular injections (e.g., in the gluteal region)

The iliac crest ends at two important bony points:

Anterior superior iliac spine (ASIS)

Posterior superior iliac spine (PSIS)

There are also smaller spines below them:

Anterior inferior iliac spine (AIIS)

Posterior inferior iliac spine (PIIS)

Question 8

the sciatic notch

Answer 8

The greater sciatic notch in the ilium allows the sciatic nerve and blood vessels to pass from the pelvis into the thigh.
Because the sciatic nerve is so important and easily damaged, injections in the buttock must be done high and to the outer side, in the area of the upper iliac region, to avoid hitting the nerve.

Question 9

ischium

Answer 9

The ischium is the part of the hip bone we sit on because it’s the lowest part of the pelvis, near the coccyx.

The ischial tuberosity is the roughened area that bears the body’s weight when sitting.

The ischial spine, located above it, is an important landmark in childbirth because it helps determine the width of the pelvic outlet, affecting how easily a baby can pass through during delivery.

Question 10

pubis

Answer 10

The pubis is the front bottom part of the hip bone.
It helps form the obturator foramen, an opening for nerves and vessels to pass to the leg.
The left and right pubic bones join together at the pubic symphysis, a slightly movable joint in the front center of the pelvis.

Question 11

acetbulum

Answer 11

The ilium, ischium, and pubis fuse together to form the acetabulum, a deep socket that holds the head of the femur and forms the hip joint.

Question 12

false and true pelvis

Answer 12

The false pelvis is located above the pelvic brim and between the flaring parts of the ilium.
It helps support the abdominal organs but is not involved in childbirth.

The true pelvis is below the pelvic brim, and it’s completely surrounded by bone.
It holds the pelvic organs (like the bladder and reproductive organs) and forms the birth canal — the passage through which a baby is delivered.

Pelvic Inlet:

The top opening into the true pelvis

Formed by the pelvic brim

Pelvic Outlet:

The bottom opening of the true pelvis

Measured between the ischial spines