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Questions and Answers

Which bone is commonly referred to as the cheekbone?

  • Zygomatic (correct)
  • Maxilla
  • Mandible
  • Palatine

What is the function of the mastoid process?

  • Holds the lower jaw
  • Supports the auditory ossicles
  • Facilitates attachment for neck muscles (correct)
  • Serves as a passageway for sound

Which suture connects the occipital and parietal bones?

  • Squamous suture
  • Sagittal suture
  • Lambdoid suture (correct)
  • Coronal suture

Which bone forms the posterior part of the nasal cavity?

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

What is the primary characteristic of long bones?

<p>They are longer than they are wide. (C)</p> Signup and view all the answers

Where is the mandible positioned relative to the maxilla?

<p>Inferior to the maxilla (D)</p> Signup and view all the answers

Which zone of the epiphyseal plate is responsible for chondrocytes dividing and forming columns?

<p>Zone of Proliferation (C)</p> Signup and view all the answers

Which bone is not classified as a facial bone?

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

What is the primary function of the nasal concha?

<p>Facilitate air passage and filtration (C)</p> Signup and view all the answers

What type of ossification occurs within cartilage?

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

The term 'calvaria' refers to which part of the skull?

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

Which of the following statements best describes the role of osteoblasts?

<p>They deposit new bone matrix. (A)</p> Signup and view all the answers

In which type of bones would you find many irregular shapes?

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

What is the purpose of the articular cartilage found at the ends of long bones?

<p>To provide cushioning between bones. (B)</p> Signup and view all the answers

What characterizes the zone of calcification in the epiphyseal plate?

<p>Calcified cartilage matrix develops. (B)</p> Signup and view all the answers

What type of bone growth is described by the addition of new bone matrix on the surface of existing bone?

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

What is the primary function of the pelvic girdle?

<p>Support and movement of the lower limb (C)</p> Signup and view all the answers

Which bone is considered the only bone of the arm?

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

What is the anatomical neck of the humerus?

<p>Situated around the head of the humerus (D)</p> Signup and view all the answers

Which carpal bone is boat-shaped?

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

What connects the scapula to the sternum?

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

Which of the following bones is part of the distal row of carpals?

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

Where is the deltoid tuberosity located?

<p>On the lateral surface of the humerus (A)</p> Signup and view all the answers

Which of the following bones is commonly recognized as the point of muscle attachment on the humerus?

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

What is the main function of the ulnar tuberosity?

<p>Serve as an attachment site for arm muscles (C)</p> Signup and view all the answers

Which bone is described as the shin bone?

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

Where is the intercondylar prominence located?

<p>Between the medial and lateral condyles of the tibia (C)</p> Signup and view all the answers

What shape is the lunate surface of the acetabulum?

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

Which pelvic characteristic is true about the female pelvis?

<p>More rounded pelvic inlet and outlet (D)</p> Signup and view all the answers

What is the purpose of the styloid processes of the radius and ulna?

<p>Provide attachment for wrist ligaments (B)</p> Signup and view all the answers

Which of the following structures is located superior to the ischial spine?

<p>Greater sciatic notch (A)</p> Signup and view all the answers

What is the main function of osteoblasts?

<p>Produce collagen and proteoglycans (C)</p> Signup and view all the answers

Where are osteocytes primarily located?

<p>Between concentric lamellae (C)</p> Signup and view all the answers

Which bone is larger and supports the weight of the leg?

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

What is the role of the endosteum in bone structure?

<p>Contains progenitor cells and osteoclasts (D)</p> Signup and view all the answers

What describes the structure of concentric lamellae?

<p>Structurally similar to a bulls-eye target (A)</p> Signup and view all the answers

What is the primary function of red bone marrow?

<p>Production of red blood cells (C)</p> Signup and view all the answers

What is NOT a characteristic of intramembranous ossification?

<p>It involves the formation of bone from cartilage (B)</p> Signup and view all the answers

What is the function of Volkmann's canal?

<p>Serves as a pathway for blood vessels (A)</p> Signup and view all the answers

What is an example of a location where yellow bone marrow is primarily found?

<p>In the medullary cavity of long bones (A)</p> Signup and view all the answers

What is the primary function of the foot arches during standing and walking?

<p>Distribute the weight of the body between the heel and the ball of the foot (D)</p> Signup and view all the answers

What is the purpose of the fontanelles in an infant's skull?

<p>To allow flexibility during birth (B)</p> Signup and view all the answers

At what age does the anterior fontanelle typically close?

<p>12-18 months (D)</p> Signup and view all the answers

What type of joint is characterized as immovable?

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

What is the process called when two bones grow together across a joint to form a single bone?

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

Which type of joint allows for slight movement and includes the radius and ulna?

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

Gomphoses joints are characterized by which primary feature?

<p>Pegs held in place within sockets by fibrous tissue (C)</p> Signup and view all the answers

Which class of joints includes both cartilaginous and synovial types?

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

Flashcards

Osteoblast

Bone-forming cell that produces collagen and proteoglycans.

Haversian System/Osteon

Structural unit of compact bone, consisting of a central canal surrounded by concentric lamellae.

Concentric Lamellae

Rings of bone tissue surrounding the central canal in an osteon.

Osteocytes

Mature bone cells located in lacunae within the bone matrix.

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Red Bone Marrow

Site of red blood cell production.

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Yellow Bone Marrow

Mostly adipose tissue found in the medullary cavity of long bones.

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Periosteum

Connective tissue membrane covering the outer surface of bones.

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Circumferential Lamellae

Thin plates that extend around the bone and form outer surfaces of compact bones.

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Interstitial Lamellae

Remnants of circumferential or concentric lamellae partially removed during bone remodeling.

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Volkmann's Canal

Canals through which blood vessels from the periosteum or medullary cavity enter the bone.

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Intramembranous Ossification

Formation of bones within a connective tissue membrane.

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Center of Ossification

Area where bone formation begins and grows outwards.

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Fontanelles

Spaces in the skull where bone formation is incomplete.

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Endochondral Ossification

The process of bone formation within cartilage.

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Appositional Growth

Bone growth by adding new bone tissue to the surface.

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Epiphyseal Plate

Growth plate in long bones, responsible for bone lengthening.

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Long Bones

Bones longer than they are wide (e.g., limbs).

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Short Bones

Cube-shaped or round bones (e.g., wrist and ankle bones).

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Flat Bones

Thin, flattened, and often curved bones (e.g., skull).

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Irregular Bones

Bones with shapes that don't fit other categories (e.g., vertebrae).

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Diaphysis

The shaft of a long bone, primarily compact bone.

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Cancellous Bone

Spongy bone with a network of trabeculae.

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Bone Lengthening

Growth occurring at the epiphyseal plate.

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Growth in Long Bones

Bone length is achieved by the growth of the epiphyseal plate.

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Zone of Resting

Region of cartilage closest to epiphysis, contains chondrocytes that don't divide quickly.

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Zone of Proliferation

Cartilage growth zone where chondrocytes divide and form columns.

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Zone of Hypertrophy

Chondrocytes mature and enlarge in this zone.

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Zone of Calcification

Chondrocytes and matrix become calcified in this region.

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Maxilla

One of the two bones forming the upper jaw.

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Zygomatic bone

The bone that forms the cheek.

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Mandible

The lower jaw bone.

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External auditory meatus

The opening of the ear canal.

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Mastoid Process

A projection behind the ear.

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Facial Bones

Bones that form the face, supporting vision, smell, & taste.

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Temporal Bone

Bone that houses the auditory ossicles.

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Zygomatic Arch

A bridge-like structure formed from the temporal and zygomatic bones.

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Calvaria

Top part of the skull (skullcap).

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Suture

Joint connecting bones of the skull.

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Pectoral Girdle

Attachment of upper limb; composed of scapula (2) and clavicle (2), supporting and enabling upper limb movement.

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Scapula

One of two flat bones that make up the pectoral girdle.

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Clavicle

Collar bone; connects scapula to sternum (breastbone).

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Humerus

Only bone in the upper arm between shoulder and elbow.

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Glenoid Cavity

Socket on the scapula that receives the humerus.

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Surgical Neck (Humerus)

Common fracture site of the humerus.

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Intertubercular Groove

Groove between tubercles; contains tendon of biceps brachii muscle.

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Deltoid Tuberosity

Attachment site on the humerus for the deltoid muscle.

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Carpals

Group of 8 small bones in the wrist forming two rows.

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Pelvic Girdle

Attachment point for lower limbs; forms a strong, firmly attached support.

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Dense Regular Connective Tissue

A type of connective tissue with closely packed, parallel collagen fibers, providing strength and support in one direction.

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Foot Arches

Structures in the foot that distribute body weight between the heel and ball of the foot during walking and standing.

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Transverse Arch

An arch across the foot from one side to the other.

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Longitudinal Arch

An arch along the length of the foot.

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Fontanelle

An unossified membrane between skull bones, allowing for flexibility and growth in infants.

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Ant. Fontanelles

Anterior part of the fontanelle that closes at age 12–18 months.

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Post. Fontanelles

Posterior part of the fontanelle that closes by the age of 2 months.

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Synostosis

When two bones fuse across a joint to become a single bone.

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Syndesmoses

Fibrous joints binding bones together with some flexibility.

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Gomphoses

Joints where pegs fit in sockets, held by fibrous tissue (teeth in jaw).

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Articulation

Place where two or more bones meet.

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Synarthrodial Joints

Immovable joints.

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Amphiarthrodial Joints

Slightly movable joints.

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Diarthrodial Joints

Freely movable joints.

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Acetabulum

The socket-like structure where the thigh bone (femur) connects to the pelvic girdle.

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Radial tuberosity

A projection on the radius (forearm bone) where a muscle called biceps brachii attaches.

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Ulnar tuberosity

A bony bump on the ulna (forearm bone) involved in muscle attachment.

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Styloid process

A projection on the ulna and radius, providing attachment sites for wrist ligaments.

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Obturator foramen

A large opening in the hip bone, mostly filled with fibrous connective tissue.

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ASIS

Anterior Superior Iliac Spine; a bony prominence on the front upper part of the ilium.

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Greater sciatic notch

A curved indentation superior to the ischial spine.

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Lesser sciatic notch

An indentation inferior to the ischial spine.

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False pelvis

The upper part of the bony pelvis, not involved in childbirth.

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True pelvis

The lower portion of the pelvis involved in childbirth.

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Pelvic inlet

The opening of the true pelvis.

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Pelvic outlet

The inferior opening of the true pelvis.

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Female pelvis

Shape of the pelvis in women, characterized by a broader and more rounded structure compared to men.

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Male pelvis

Shape of the pelvis in men, characterized by a heavier and deeper structure.

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Tibia

The larger of the two lower leg bones, supporting most of the weight.

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Fibula

The smaller lower leg bone, providing stability, not primarily weight-bearing.

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Tibial tuberosity

A bump on the tibia, where the quadriceps muscle attaches

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Anterior crest

Sharp ridge on the tibia that runs down the front of the shin.

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Intercondylar prominence

A ridge that separates the medial and lateral condyles on the tibia.

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