Human Anatomy Quiz: Skeletal System
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Questions and Answers

Which bones make up the pectoral girdle?

  • Clavicle, Radius, Ulna
  • Humerus, Radius, Ulna
  • Clavicle, Scapula, Sternum (correct)
  • Clavicle, Humerus, Scapula
  • What is the function of the cranium?

  • To protect the brain (correct)
  • To provide support for the rib cage
  • To protect the spinal cord
  • To provide support for the pelvic girdle
  • Which bones are part of the lower limb?

  • Humerus, Radius, Ulna, Carpals
  • Vertebra, Ribs, Sternum, Clavicle
  • Femur, Tibia, Fibula, Patella (correct)
  • Clavicle, Scapula, Sternum, Ribs
  • Which bone is NOT part of the axial skeleton?

    <p>Femur (C)</p> Signup and view all the answers

    Which of these bone groups is part of the upper limb?

    <p>Carpals, Metacarpals, Phalanges (A)</p> Signup and view all the answers

    Which bone of the forearm is on the lateral side of the body in anatomical position?

    <p>Radius (C)</p> Signup and view all the answers

    Which structure on the ulna articulates with the humerus at the elbow joint?

    <p>Both B and C (D)</p> Signup and view all the answers

    The radial groove is a feature of which bone?

    <p>Humerus (C)</p> Signup and view all the answers

    Which bone of the forearm articulates with the capitulum of the humerus?

    <p>Radius (A)</p> Signup and view all the answers

    What is the name of the bony projection on the ulna that forms the point of your elbow?

    <p>Olecranon (A)</p> Signup and view all the answers

    Which of the following is NOT a bone of the pectoral girdle?

    <p>Humerus (A), Sternum (D)</p> Signup and view all the answers

    What is the correct description of the clavicle?

    <p>A long bone that connects the sternum to the scapula. (A)</p> Signup and view all the answers

    What part of the vertebra is located closest to the skull?

    <p>Jugular notch (C)</p> Signup and view all the answers

    Which type of rib directly attaches to the sternum?

    <p>True ribs (A)</p> Signup and view all the answers

    What is the function of the pelvic girdle?

    <p>To support and attach the lower limbs to the axial skeleton. (D)</p> Signup and view all the answers

    Which bone forms the anterior part of the shoulder girdle?

    <p>Clavicle (C)</p> Signup and view all the answers

    Which of the following is NOT a bone found in the upper limb?

    <p>Femur (A)</p> Signup and view all the answers

    What is the function of the costal cartilage?

    <p>To provide flexibility and movement to the rib cage. (A)</p> Signup and view all the answers

    What is the main function of the scapula?

    <p>To allow for a wide range of movement of the upper limb (C)</p> Signup and view all the answers

    What feature of the scapula allows for the attachment of muscles?

    <p>All of the above (D)</p> Signup and view all the answers

    Which bone articulates with the scapula to form the acromioclavicular joint?

    <p>Clavicle (C)</p> Signup and view all the answers

    What is the function of the coracoid process?

    <p>To provide a point of attachment for ligaments and muscles (C)</p> Signup and view all the answers

    What is the name given to the shallow socket on the scapula where the humerus fits?

    <p>Glenoid cavity (C)</p> Signup and view all the answers

    Which of the following bones is not part of the pectoral girdle?

    <p>Humerus (D)</p> Signup and view all the answers

    What is the name of the bony prominence on the posterior surface of the scapula?

    <p>Spine (A)</p> Signup and view all the answers

    Which of the following statements about the clavicle is correct?

    <p>It is a curved bone that helps to maintain the position of the shoulder joint. (C)</p> Signup and view all the answers

    Which of these features are characteristic of the female pelvis?

    <p>The ilia flare more laterally. (C)</p> Signup and view all the answers

    What is the most prominent feature of the hip bone?

    <p>Iliac crest (C)</p> Signup and view all the answers

    What is the joint that connects the two hip bones anteriorly at the midline?

    <p>Pubic symphysis (B)</p> Signup and view all the answers

    Which bone forms the posterior part of the pelvic girdle?

    <p>Sacrum (C)</p> Signup and view all the answers

    Which of these features is NOT found on the lateral surface of the ilium?

    <p>Ischial spine (A)</p> Signup and view all the answers

    What is the name of the structure that covers the inner shaft of a long bone?

    <p>Endosteum (C)</p> Signup and view all the answers

    Which type of cell is responsible for breaking down bone matrix?

    <p>Osteoclasts (B)</p> Signup and view all the answers

    During the second phase of ossification, what happens to the hyaline cartilage?

    <p>It is slowly absorbed and replaced by new bone. (A)</p> Signup and view all the answers

    What is the name of the small canals that radiate outward from the central canal in an osteon?

    <p>Canaliculi (B)</p> Signup and view all the answers

    What is the main function of Volkmann's canals?

    <p>To connect the hard outside of the bone to the inside. (A)</p> Signup and view all the answers

    Which of the following is NOT a phase of bone healing?

    <p>Nerve regeneration (D)</p> Signup and view all the answers

    What is the primary function of articular cartilage?

    <p>To provide a smooth surface for joint surfaces. (D)</p> Signup and view all the answers

    Where is red marrow found in adults?

    <p>Spongy bone of flat bones (A)</p> Signup and view all the answers

    What is the role of osteoblasts in bone remodeling?

    <p>To form new bone matrix. (C)</p> Signup and view all the answers

    Which hormone is released when the body senses a decrease in blood calcium levels?

    <p>Parathyroid hormone (PTH) (B)</p> Signup and view all the answers

    What is the primary difference between an open and closed fracture?

    <p>Whether or not the bone penetrates the skin. (D)</p> Signup and view all the answers

    What is the name of the structure that forms a splint to hold the ends of a broken bone together during the healing process?

    <p>Fibrocartilage callus (B)</p> Signup and view all the answers

    What is the role of phagocytes in bone healing?

    <p>To remove dead tissue and debris. (B)</p> Signup and view all the answers

    Which of the following is NOT a function of the axial skeleton?

    <p>Providing attachment points for muscles involved in limb movement. (D)</p> Signup and view all the answers

    Which of the following is an example of a bone that is NOT part of the axial skeleton?

    <p>Humerus (A)</p> Signup and view all the answers

    Which of the following statements is TRUE about the epiphyseal plate?

    <p>It is present in children and is responsible for bone growth. (C)</p> Signup and view all the answers

    Flashcards

    Cranium

    The part of the skull that encloses the brain.

    Vertebral Column

    The spine, composed of vertebrae, supporting the body.

    Bony Thorax

    The rib cage formed by ribs and sternum protecting thoracic organs.

    Pectoral Girdle

    The structure connecting the upper limbs to the torso, including the clavicle and scapula.

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    Pelvic Girdle

    The basin-shaped structure that connects the lower limbs to the axial skeleton.

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    Thoracic Vertebrae

    Twelve vertebrae in the upper back, labeled T1-T12.

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    True Ribs

    Ribs 1–7 that attach directly to the sternum via cartilage.

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    False Ribs

    Ribs 8–12 that do not attach directly to the sternum.

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    Floating Ribs

    Ribs 11 and 12, that have no anterior attachment.

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    Sternum

    Flat bone in the center of the chest, connecting ribs through cartilage.

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    Clavicle

    Collarbone that connects the arm to the body; part of the pectoral girdle.

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    Ulna

    The medial bone in the forearm's anatomical position.

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    Radius

    The lateral bone in the forearm's anatomical position.

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    Coronoid process

    Part of the ulna that articulates with the humerus at the elbow.

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    Olecranon

    The part of the ulna that forms the elbow's bony prominence.

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    Trochlear notch

    A notch in the ulna that articulates with the humerus.

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    Iliac Crest

    The superior border of the ilium, a large bone in the pelvis.

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    Acetabulum

    The cup-shaped socket in the hip bone where the femur fits, allowing for hip joint movement.

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    Pubic Arch

    The angle formed by the pubic bones at the front of the pelvis; wider in females.

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    Greater Sciatic Notch

    The large indentation in the ilium through which the sciatic nerve passes.

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    Ischial Spine

    A bony projection on the posterior part of the ischium, important for pelvic support.

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    Scapula

    A light and poorly reinforced bone that forms part of the shoulder girdle, allowing arm flexibility.

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    Shoulder Girdle

    A structure that connects the upper limbs to the trunk, comprising the scapula and clavicle.

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    Acromioclavicular Joint

    The joint where the acromion of the scapula meets the clavicle, facilitating shoulder movement.

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    Glenoid Cavity

    The socket in the scapula that receives the head of the humerus, allowing arm movement.

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    Acromion

    A bony projection on the scapula that extends over the shoulder joint and provides muscle attachment.

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    Suprascapular Notch

    A notch in the scapula allowing passage for nerves and blood vessels.

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    Epiphysis

    The end part of a long bone, consisting of compact and spongy bone.

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    Articular Cartilage

    Hyaline cartilage covering the epiphysis for smooth joint movement.

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    Epiphyseal Line

    A thin line in an adult bone, the remnant of the growth plate.

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    Periosteum

    A fibrous layer covering the outer surface of bones.

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    Medullary Cavity

    The central cavity of a bone, housing yellow marrow in adults.

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    Ossification

    The process of bone formation from hyaline cartilage.

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    Osteoblasts

    Bone-forming cells that secrete bone matrix.

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    Osteoclasts

    Bone-resorbing cells that break down bone matrix.

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    Haversian Canal

    Central canal for blood vessels and nerves in bone.

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    Canaliculi

    Small canals in bone that connect lacunae to Haversian canals.

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    Bone Remodeling

    The process where bone is continuously renewed and reshaped.

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    Hematoma

    A localized collection of blood outside of blood vessels after a fracture.

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    Fibrocartilage Callus

    A mass of repair tissue formed during the healing of a fracture.

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    Bony Callus

    A mass of spongy bone that replaces the fibrocartilage callus.

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    Axial Skeleton

    The part of the skeleton that forms the body’s longitudinal axis.

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    Study Notes

    Skeletal System Overview

    • The skeletal system is divided into two main parts: the axial skeleton and the appendicular skeleton
    • The axial skeleton forms the longitudinal axis of the body and includes the skull, vertebral column, and bony thorax
    • The appendicular skeleton includes the limbs (appendages) and the pectoral and pelvic girdles
    • The adult human skeleton consists of 206 bones

    Skull

    • Two sets of bones make up the skull: the cranium and facial bones
    • The cranium protects the brain
    • Facial bones hold the eyes in place and allow for facial expressions
    • Skull bones are joined by sutures (immovable joints)
    • The mandible (jawbone) is the only freely movable skull bone

    Cranial Bones

    • 8 cranial bones
    • Frontal bone
    • Occipital bone
    • 2 Parietal bones
    • 2 Temporal bones
    • Ethmoid bone
    • Sphenoid bone

    Facial Bones

    • 14 facial bones
    • 2 Maxillae
    • 2 Palatine bones
    • 2 Lacrimal bones
    • 2 Zygomatic bones
    • 2 Nasal bones
    • Vomer bone
    • 2 Inferior nasal conchae
    • Mandible

    Skull Features

    • Suture lines join skull bones
    • Paranasal sinuses are air-filled cavities within bones that lighten the skull and amplify sounds

    Hyoid Bone

    • A U-shaped bone in the neck, not directly connected to another bone
    • Supports the tongue
    • Important for swallowing and speech

    Vertebral Column

    • Also known as the spine
    • Provides axial support that extends from the skull to the pelvis
    • Consists of 26 vertebrae separated by intervertebral discs
    • Regions include:
      • 7 cervical vertebrae (neck)
      • 12 thoracic vertebrae (chest)
      • 5 lumbar vertebrae (lower back)
      • Sacrum (formed from 5 fused vertebrae)
      • Coccyx (formed from 3-5 fused vertebrae)

    Vertebral Column Curvatures

    • Primary curvatures (thoracic and sacral regions) are present at birth
    • Secondary curvatures (cervical and lumbar regions) develop after birth

    Vertebral Structure

    • Parts of a typical vertebra include the body, vertebral arch, pedicles, laminae, vertebral foramen, transverse processes, spinous process, and superior and inferior articular processes.

    Thoracic Cage

    • Protects organs in the thoracic cavity
    • Composed of the sternum, ribs, and thoracic vertebrae

    Ribs Structure

    • True ribs (pairs 1-7), attached directly to sternum
    • False ribs (pairs 8-10), attached to cartilage of the 7th rib
    • Floating ribs (pairs 11-12), no anterior attachment

    Bones of the Appendicular Skeleton

    • 126 bones
    • Limbs (appendages)
    • Pectoral girdle
    • Pelvic girdle

    Pectoral Girdle

    • Composed of the clavicle and scapula
    • Provides upper limb attachment to the axial skeleton
    • Light, flexible construction allows exceptional mobility

    Upper Limbs

    • Humerus (arm bone) has proximal and distal articulation points
    • Ulna and radius (forearm bones) are both articulate with the humerus.
    • Carpals, metacarpals, and phalanges comprise the hand

    Pelvic Girdle

    • Formed from the fusion of the ilium, ischium, and pubis
    • Supports the weight of the upper body
    • Protects reproductive organs, bladder, and portion of the large intestine;
    • The inlet and outlet of the pelvis differs between the sexes

    Lower Limbs

    • Femur (thigh bone)
    • Tibia and fibula (leg bones)
    • Tarsals, metatarsals, and phalanges (foot bones)

    Bone Remodeling

    • Bones are constantly changing in response to internal and external factors.
    • Bone remodeling involves the breakdown of old bone tissue (by osteoclasts) and the formation of new bone tissue (by osteoblasts)
    • This process is crucial for maintaining bone integrity and strength
    • Also critical for bone repair after a fracture

    Bone Fracture

    • A fracture occurs when the force applied to a bone exceeds its strength
    • Classified as "open" or "closed" depending on whether the broken bone extends through the skin
    • Treatment involves reduction (realignment) of bone ends

    Fracture Healing

    • Bone healing occurs in 4 phases
      • Hematoma formation
      • Fibrocartilage callus formation
      • Bony callus formation
      • Bone remodeling

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    Skeletal System Lecture PDF

    Description

    Test your knowledge on the human skeletal system with this quiz. It covers various components, including the pectoral girdle, lower limb bones, and their functions. Perfect for students of anatomy or anyone interested in human biology.

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