Appendicular Skeletal System Overview

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Questions and Answers

What is the primary function of the glenoid cavity in the scapula?

To provide attachment for muscles

To protect the humerus

To articulate with the head of the humerus (correct)

To support the weight of the arm

Which of the following bones forms the medial side of the forearm?

Radius

Ulna (correct)

Scapula

Humerus

Which part of the humerus is a common area for fractures?

Surgical neck (correct)

Greater tubercle

Capitulum

Deltoid tuberosity

What structure of the ulna provides a prominent feature known as the tip of the elbow?

Olecranon process Signup and view all the answers

Which of the following is a component of the pelvic girdle?

Ischium Signup and view all the answers

How many carpal bones are present in the human hand?

8 Signup and view all the answers

What is the function of the greater sciatic notch in the hip bone?

Allows passage of the sciatic nerve Signup and view all the answers

Which of the following components is NOT part of the phalanges?

Carpal phalanx Signup and view all the answers

Which of the following is NOT a component of the appendicular skeleton?

Cervical vertebrae Signup and view all the answers

What is the primary function of the clavicle in the pectoral girdle?

Connecting the upper limb to the axial skeleton Signup and view all the answers

Which bone is commonly referred to as the shoulder blade?

Scapula Signup and view all the answers

Identify a major difference between the male and female pelvis.

The female pelvis has a broader and rounder pelvic cavity. Signup and view all the answers

Which feature is characteristic of the female pelvis compared to the male pelvis?

Flared iliac bones Signup and view all the answers

What is the total number of bones included in the human appendicular skeleton?

126 Signup and view all the answers

What is the primary function of the linea aspera on the femur?

Attachment site for large hip muscles Signup and view all the answers

What role does the scapula play in the upper limbs?

It acts as an attachment point for arm muscles. Signup and view all the answers

Which structure does NOT form part of the true pelvis?

Lumbar vertebrae Signup and view all the answers

Which structure connects the sternum to the scapula?

Clavicle Signup and view all the answers

What term best describes the girdle that connects the limbs to the axial skeleton?

Pectoral girdle Signup and view all the answers

What is the main characteristic of the obturator foramen?

It is a feature of the pelvis. Signup and view all the answers

Which bone does NOT bear any body weight?

Fibula Signup and view all the answers

What is the role of the medial malleolus?

Stabilizes the ankle joint Signup and view all the answers

Which part of the patella is the narrow apex directed toward?

The tibia Signup and view all the answers

Which of the following bones is part of the lower limb?

Tibia Signup and view all the answers

Study Notes

Appendicular Skeletal System

The appendicular skeleton comprises bones of the limbs, pectoral girdle, and pelvic girdle.
These structures connect the limbs to the axial skeleton.
The pectoral girdle consists of the scapula (shoulder blade) and clavicle (collarbone).
The clavicle is a slender, curved bone attaching to the sternum medially and the scapula laterally, forming the shoulder joint.
The scapula is a flattened, triangular bone with an acromion and coracoid processes.
The glenoid cavity of the scapula articulates with the humerus head.
Humerus: the long bone of the arm.
Radius and ulna form the forearm.
The hand consists of eight carpal bones, five metacarpal bones, and phalanges (finger bones).
Pelvic girdle consists of two coxal (hip) bones joined by the pubic symphysis.
The sacrum joins the pelvic girdle posteriorly forming the sacroiliac joint.
Each hip bone consists of three bones: ilium, ischium, and pubis.
The iliac crest is a prominent ridge on the ilium.
Iliac spines (anterior superior and anterior inferior iliac spines) are prominent bony landmarks.
The greater and lesser sciatic notches allow passage of the sciatic nerve.
Ischial spines and tuberosity are important bony landmarks.
The pubic symphysis is a fibrocartilaginous joint joining hip bones.
The acetabulum is the socket where the femur joins the pelvic girdle.
The female pelvis tends to be wider and shallower than the male pelvis.
Key differences in the male and female pelvis include the angle of the pubic arch, the distance between ischial spines, ischial tuberosities, and the shape and curvature of the sacrum.
The femur is the longest, heaviest, and strongest bone in the body.
The femur has a proximal head, a neck, greater and lesser trochanters for muscle attachment, a linea aspera, and distal condyles and epicondyles.
The patella is a sesamoid bone within the quadriceps tendon.
The tibia is the medial, larger lower leg bone.
The fibula is the smaller, lateral lower leg bone.
The tarsals are the ankle bones (calcaneus, talus, cuboid, navicular, and three cuneiforms).
The metatarsals are the foot bones.
The phalanges are toe bones.

Learning Outcomes

Students should be able to identify bones of the appendicular skeleton.
Students should be able to distinguish between male and female pelvis features.

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Description

This quiz covers the key components of the appendicular skeletal system, including the bones of the limbs and girdles. You'll learn about the pectoral girdle, pelvic girdle, and the individual bones that form these structures. Test your knowledge on the anatomy and functions of the appendicular skeleton.