Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

7. The Skeletal System

The Pelvic Girdle

Anatomy & Physiology

7. The Skeletal System

The Pelvic Girdle

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Problem 14

Textbook Question

The large foramen between the pubic ramus and ischial ramus is the:
(a) Foramen magnum
(b) Suborbital foramen
(c) Acetabulum
(d) Obturator foramen

Verified step by step guidance

Step 1: Begin by identifying the anatomical location described in the question. The pubic ramus and ischial ramus are parts of the pelvis, specifically the os coxae (hip bone). This narrows the focus to structures within the pelvic region.

Step 2: Recall the function and location of each option provided: (a) Foramen magnum is located in the skull and connects the brainstem to the spinal cord, so it is not relevant to the pelvis. (b) Suborbital foramen is located in the facial bones near the orbit of the eye, so it is also not relevant. (c) Acetabulum is the socket in the pelvis that articulates with the femur, but it is not a foramen. (d) Obturator foramen is a large opening in the pelvis formed by the pubic and ischial rami, making it the most likely answer.

Step 3: Understand the purpose of the obturator foramen. It serves as a passageway for nerves and blood vessels, specifically the obturator nerve, artery, and vein, which supply the medial thigh.

Step 4: Confirm the anatomical relationship between the pubic ramus and ischial ramus. These two structures form the boundaries of the obturator foramen, reinforcing that this is the correct answer.

Step 5: Conclude that the correct answer is (d) obturator foramen based on its anatomical location and function, as it is the large foramen formed by the pubic and ischial rami.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Foramina in the Pelvis

Foramina are openings in bones that allow for the passage of nerves and blood vessels. In the pelvis, these openings are crucial for connecting various structures and facilitating movement. Understanding the specific foramina, such as the obturator foramen, is essential for identifying their functions and anatomical significance.

Obturator Foramen

The obturator foramen is a large opening located between the pubic ramus and ischial ramus of the pelvis. It is the largest foramen in the human body and serves as a passageway for the obturator nerve and blood vessels. Recognizing its location and function is vital for understanding pelvic anatomy and related clinical implications.

Anatomical Terminology

Anatomical terminology provides a standardized language for describing the locations and relationships of body structures. Terms like 'pubic ramus' and 'ischial ramus' are essential for accurately identifying anatomical features. Familiarity with this terminology is crucial for effective communication in medical and anatomical contexts.

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Related Practice

Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

a. The obturator foramen articulates with the head of the femur at the hip joint.

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Textbook Question

Ms. Hendrix suffered a severe hip fracture that required hip replacement surgery. After an extended recovery period, she is undergoing physical therapy to regain strength and mobility.

Which bone is involved in a hip fracture, and what part of the bone is likely to be fractured?

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Textbook Question

What bones make up each hip bone (coxal bone)? Which of these is the largest?

Which has tuberosities that we sit on?

Which is the most anterior?

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Textbook Question

Investigators find the pelvis of a human and are able to identify the sex, the relative age, and some physical characteristics of the person. How is this possible from only the pelvis?

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Multiple Choice

Which of the following bones forms the posterior portion of the pelvic girdle?

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Multiple Choice

On which bone is the acetabulum found?