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

Bones of the Upper Limb

Anatomy & Physiology

7. The Skeletal System

Bones of the Upper Limb

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Problem 13

Textbook Question

The only bone of the arm is the _. The forearm consists of the medial and the lateral_.

Verified step by step guidance

Step 1: Understand the anatomy of the arm and forearm. The arm refers to the region between the shoulder and the elbow, while the forearm is the region between the elbow and the wrist.

Step 2: Recall that the arm contains only one bone, which is the largest and strongest bone in this region. This bone connects the shoulder to the elbow.

Step 3: For the forearm, identify the two bones present. One is located medially (closer to the body's midline), and the other is located laterally (farther from the body's midline).

Step 4: The medial bone of the forearm is longer and forms the primary articulation with the humerus at the elbow joint. The lateral bone is shorter and plays a key role in wrist movement.

Step 5: Fill in the blanks with the correct anatomical terms: the bone of the arm is the 'humerus,' the medial bone of the forearm is the 'ulna,' and the lateral bone of the forearm is the 'radius.'

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Key Concepts

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

Humerus

The humerus is the long bone of the upper arm, extending from the shoulder to the elbow. It plays a crucial role in the arm's structure and function, serving as the attachment point for muscles that facilitate movement. Understanding the humerus is essential for comprehending the anatomy of the arm.

Ulna

The ulna is one of the two bones in the forearm, located on the medial side (the side closest to the body). It is longer than the radius and forms the elbow joint with the humerus. The ulna is important for the stability and movement of the forearm and wrist.

Radius

The radius is the other bone in the forearm, situated laterally (on the side away from the body) relative to the ulna. It is shorter than the ulna and plays a key role in the rotation of the forearm, allowing for movements such as pronation and supination. Understanding the radius is vital for grasping the functional anatomy of the forearm.

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Master Overview of the Arm and Forearm with a bite sized video explanation from Bruce Bryan

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Related Practice

Textbook Question

Which of the following portions of the scapula articulates with the clavicle?

a. Coracoid process

b. Acromion

c. Spine

d. Glenoid cavity

Use key choices to identify the bone descriptions that follow.

Key:

a. carpals

b. femur

c. fibula

d. humerus

e. radius

f. tarsals

g. tibia

h. ulna

______ (1) articulates with the acetabulum and the tibia

______ (2) forms the lateral aspect of the ankle

______ (3) bone that 'carries' the hand

______ (4) the wrist bones

______ (5) end shaped like a monkey wrench

______ (6) articulates with the capitulum of the humerus

______ (7) largest bone of this 'group' is the calcaneus

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Textbook Question

Justiniano worked in a poultry-packing plant where his job was cutting open chickens and stripping out their visceral organs. After work, he typed for long hours on his computer keyboard, writing a book about his work in the plant. Soon, his wrist and hand began to hurt whenever he flexed it, and he began to awaken at night with pain and tingling on the thumb half of his hand. What condition did he probably have?

The 'elbow bone' is called the:

a. Trochlea

b. Capitulum

c. Olecranon

d. Deltoid tuberosity

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