skeletal

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1
What are the six major functions of the skeletal system?
Support, protection, movement, mineral storage, blood cell production, and fat storage.
2
What are the two divisions of the skeleton?
Axial skeleton and appendicular skeleton.
3
What makes up the axial skeleton?
The skull, vertebral column, ribs, sternum, and associated bones.
4
What makes up the appendicular skeleton?
The limbs and the pectoral and pelvic girdles.
5
What does the axial skeleton primarily do?
Supports and protects the body's central organs and structures.
6
What does the appendicular skeleton primarily do?
Allows movement and locomotion.
7
What bone is the upper arm bone?
Humerus.
8
What bones are in the forearm?
Radius and ulna.
9
Which forearm bone is on the thumb side?
Radius.
10
Which forearm bone is on the little-finger side?
Ulna.
11
What is the thigh bone?
Femur.
12
What are the lower leg bones?
Tibia and fibula.
13
Which lower leg bone is larger and medial?
Tibia.
14
What is the kneecap called?
Patella.
15
What are the wrist bones called?
Carpals.
16
What are the ankle bones called?
Tarsals.
17
What are the palm bones called?
Metacarpals.
18
What are the foot bones between the tarsals and phalanges?
Metatarsals.
19
What are the finger and toe bones called?
Phalanges.
20
What is the collarbone called?
Clavicle.
21
What is the shoulder blade called?
Scapula.
22
What is the breastbone called?
Sternum.
23
What are the ribs?
Bones that help form and protect the thoracic cage.
24
What is the vertebral column?
The backbone that supports the body and protects the spinal cord.
25
What are long bones?
Bones longer than they are wide, such as the femur and humerus.
26
What are short bones?
Cube-shaped bones such as carpals and tarsals.
27
What are flat bones?
Thin, flattened bones such as the sternum, ribs, and scapulae.
28
What are irregular bones?
Bones with complex shapes, such as vertebrae.
29
What is compact bone?
Dense bone tissue that provides strength and forms much of the outer bone.
30
What is spongy bone?
Porous bone containing trabeculae that helps reduce weight and distribute forces.
31
What is the diaphysis?
The shaft of a long bone.
32
What is an epiphysis?
An expanded end of a long bone.
33
What is the metaphysis?
The region between the diaphysis and epiphysis.
34
What is the medullary cavity?
The hollow cavity inside the shaft of a long bone containing marrow.
35
What is the periosteum?
A connective tissue membrane covering the external bone surface.
36
What is the endosteum?
A membrane lining internal bone surfaces.
37
What is articular cartilage?
Hyaline cartilage covering joint surfaces to reduce friction and absorb shock.
38
What is the epiphyseal plate?
A cartilage plate where a growing long bone increases in length.
39
What is the epiphyseal line?
The bony remnant of the epiphyseal plate after growth stops.
40
What is red bone marrow?
Marrow that produces blood cells.
41
What is yellow bone marrow?
Fat-storing marrow found mainly in adult long bones.
42
What is hematopoiesis?
The production of blood cells.
43
What do osteoblasts do?
Build new bone tissue.
44
What do osteocytes do?
Maintain mature bone tissue and monitor its condition.
45
What do osteoclasts do?
Break down and resorb bone tissue.
46
What is osteoporosis?
A condition involving decreased bone mass and increased fracture risk.
47
What is hyaline cartilage?
A smooth, resilient cartilage found at articular surfaces and other locations.
48
What is fibrocartilage?
Strong cartilage that resists compression and is found in structures such as intervertebral discs.
49
What is a closed fracture?
A fracture in which the skin remains intact.
50
What is an open fracture?
A fracture in which the broken bone communicates with the outside through a wound.
51
What is a transverse fracture?
A fracture that runs across the bone.
52
What is an oblique fracture?
A fracture that runs diagonally across the bone.
53
What is a spiral fracture?
A fracture caused by twisting that produces a spiral pattern.
54
What is a comminuted fracture?
A fracture in which the bone breaks into multiple fragments.
55
What is a greenstick fracture?
An incomplete fracture common in children in which the bone bends and partially breaks.
56
What is an impacted fracture?
A fracture in which broken bone ends are driven into each other.
57
What happens first during fracture repair?
A hematoma forms at the fracture site.
58
What is a soft callus?
A fibrocartilaginous bridge that temporarily connects broken bone ends.
59
What is a hard callus?
New bone that replaces the soft callus.
60
What is bone remodeling?
The reshaping and strengthening of repaired bone.
61
Why is calcium important?
It supports bone structure, muscle contraction, nerve function, and blood clotting.
62
What hormone raises blood calcium levels?
Parathyroid hormone, or PTH.
63
Where are the parathyroid glands located?
On the posterior surface of the thyroid gland.
64
How does PTH increase blood calcium?
It promotes bone resorption, kidney calcium retention, and vitamin D activation.
65
What hormone can lower blood calcium?
Calcitonin.
66
What does vitamin D do for calcium balance?
It increases intestinal absorption of calcium and phosphorus.
67
What is a joint?
The location where two or more bones meet.
68
What is a synovial joint?
A freely movable joint containing a joint cavity and synovial fluid.
69
What is synovial fluid?
Fluid that lubricates joints and helps nourish articular cartilage.
70
What does a ligament connect?
Bone to bone.
71
What does a tendon connect?
Muscle to bone.
72
What is flexion?
A movement that decreases the angle between bones.
73
What is extension?
A movement that increases the angle between bones.
74
What is hyperextension?
Extension beyond the anatomical position or normal range.
75
What is abduction?
Movement away from the body's midline.
76
What is adduction?
Movement toward the body's midline.
77
What is rotation?
Movement in which a bone turns around its longitudinal axis.
78
What is pronation?
Rotation of the forearm so the palm faces posteriorly in anatomical position.
79
What is supination?
Rotation of the forearm so the palm faces anteriorly in anatomical position.
80
What is dorsiflexion?
Moving the top of the foot toward the shin.
81
What is plantar flexion?
Pointing the foot downward, as when standing on tiptoe.
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