Activity 3: Bones of the Pelvic Girdle

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1

The pelvic girdle is formed by what 3 bones?

2 hip bones and the sacrum.

2

The pelvis is formed by what 4 bones?

2 hip bones, sacrum, and coccyx

3

The bones of the shoulder girdle is light, what are the bones of the pelvic girdle like in regards to weight and size?

Heavy and massive

4

The bones of the pelvic girdle attach securely to which skeleton?

The axial skeleton

5

The sockets (or acetabulum) of the heads of the femurs are heavily reinforced by what?

Ligaments

6

The sockets of the heads of the femurs are reinforced by ligaments, and what do they provide in regards to attachment?

Stable, strong limb attachment

7

Is the ability to bear weight more important at the shoulder girdle or the pelvic girdle?

Pelvic girdle

8

The combined weight of the upper body rests on which type of girdle?

Pelvic girdle

9

Each hip bone is the fusion of what 3 bones?

1. ilium

2. ischium

3. pubis

10

The ilium, ischium, and pubis fuse at which socket?

Acetabulum

11

The acetabulum receives the head of which bone?

The femur

12

The rami of the pubis and ischium form a bar of bone enclosing what opening of the pelvic girdle?

Obturator foramen

13

The oburator foramen allows which type of vessels to pass?

Blood vessels

14

Each hip bone articulates posteriorly with what feature of the pelvic girdle?

Sacrum

15

The two hip bones join at which feature of the pelvic girdle?

Pubic symphysis

16

Which joint is a common site of lower back problems?

Sacroiliac joint

17

Why is the sacroiliac joint such a common site of lower back problems?

Because it has to bear a lot of pressure.

18

The female pelvis reflects differences for what process of life?

Childbearing

19

What 4 characteristics of the female pelvis differentiates it from the male's?

1. Wider

2. Shallower

3. Lighter

4. Rounder

20

A female pelvis supports a growing ____ and must be large enough to allow what to pass through the birth canal?

A female pelvis supports a growing fetus and is large enough to allow an infant's head to pass through the birth canal.

21

The pelvic brim is a continuous oval ridge of bone that runs along what 5 features of the pelvic girdle?

(Overlook)

1. Public symphysis

2. Pubic crests

3. Arcuate lines

4. Sacral alae

5. Sacral promontory

22

The false pelvis is superior to what feature of the pelvic girdle?

Pelvic brim

23

The false pelvis is bounded by what 2 features of the pelvic girdle and what type of vertebrae and how so directionally?

1. Alae of the ilia laterally

2. Sacral promontory posteriorly

3. Lumbar vertebrae posteriorly

24

The false pelvis supports what part of the abdomen?

Abdominal viscera

25

Does the false pelvis restrict childbirth? Yes or no?

No.

26

The true pelvis is inferior to what feature of the pelvic girdle?

Pelvic brim

27

The true pelvis is almost entirely surrounded by what tissue?

Bone

28

The posterior boundary of the true pelvis is formed by what feature of the pelvic girdle?

Sacrum

29

What 3 bones of the pelvic girdle define the limits of the true pelvis and how directionally in 2 ways?

1. Ilia

2. Ischia

3. Pubic bones

All define the limits laterally and anteriorly.

30

What is the pelvic inlet of the pelvic girdle?

The opening traced by the pelvic brim.

31

Directionally, the widest margin of the pelvic inlet is from ____ to ____ ?

Left to right

32

The pelvic outlet makes up which feature of the pelvic girdle and how so directionally?

Inferior margin of the true pelvis.

33

The pelvic outlet is bounded anteriorly by which feature of the pelvic girdle?

Pubic arch

34

The pelvic outlet is bounded laterally by which feature of the pelvic girdle?

Ischia

35

The pelvic outlet is bounded posteriorly by what 2 features of the pelvis?

1. Sacrum

2. Coccyx

36

What feature of the pelvis and what feature of the pelvic girdle can dramatically narrow the outlet and why?

1. Sharply angled coccyx

2. Sharp ischial spines

Because they protrude into the outlet opening.

37

Describe the iliac crest in regard to the pelvic girdle?

Thick superior margin of bone

38

The iliac crest is a feature of which bone of the 3 bones that make up the hip bone?

Ilium

39

Describe the iliac fossa of the pelvic girdle in regard to the iliac crest?

Shallow depression in the iliac crest.

40

The iliac fossa is a feature of which bone of the 3 bones that make up the hip bone?

Ilium

41

The iliac fossa of the pelvic girdle forms what surface of the ilium?

Internal surface of the ilium

42

The ischial tuberosity is a feature of which bone of the 3 bones that make up the hip bone?

Ischium

43

Describe the shape of the ischial tuberosity in the pelvic girdle?

Rough projection

44

The ischial tuberosity functions in which way to help a human sitting position?

Receives the weight of the body during sitting

45

How is the ischial spine located directionally in regard to the ischial tuberosity?

Superiorly

46

The ischial spine projects medially into which cavity?

Pelvic cavity

47

The ischial ramus is part of which bone?

Ischium

48

The ischium articulates with which bone of the 3 bones that makes up the hip bone?

Pubis

49

The superior and inferior pubic ramus are parts of which bone of the 3 bones that make up the hip bone?

Pubis

50

Describe the superior pubic ramus in regard to the pubis bone.

Superior extension of the body of the pubis.

51

Describe the inferior pubic ramus in regard to the pubis bone.

Inferior extension of the body of the pubis.

52

The inferior pubic ramus articulates which bone of the 3 bones that make up the hip bone?

Ischium

53
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