Skeletal System Pt.1 Flashcards by lindsay mcneil

Cell that Maintains bone tissue

Osteocyte

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6 Functions of skeletal system

Support, movement, homeostasis, storage of energy, hematopoiesis, protection

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Section of cell that contains osteocytes

Osteon

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Cells that break down bone tissue

Osteoclasts

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Process by which bones form, replacing tissue with bone

Ossification

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Between membranes and bone; width-wise

Intramembrous bone

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Between cartilage and bone; length-wise

Endochondral bone

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Cells that build bone

Osteoblasts

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Part of osteon that contains blood vessels

Osteonic canal

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Rings that go around osteonic canal

Lamellae

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Space or indentation in lamellae; contains osteocytes

Lacunae

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Part of osteon that maintains bone tissue

Osteocyte

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Canals coming off lacunae

Canaliculi

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Ends of a long bone

Epiphysis

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Founds on ends of long bones to reduce friction

Articular cartilage

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Loosely packed osteocytes/help reduce weight; where red marrow forms

Spongy bone

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Where blood cells are produced

Red marrow

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Shaft of long bone

Diaphysis

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Densely packed osteocytes to provide strength

Compact bone

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Where fat is stored

Yellow marrow

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Center of long bone, contains marrow

Medullary cavity

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Lining of medullary cavity

Endosteum

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Outer covering of long bone, tendon of muscle connects to it

Periosteum

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Shape of arm and leg bones

Long bone

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Shape of wrist and ankle bones

Short bones

Shape of cranial bones, sternum, and ribs

Flat bones

Shape of vertebrae, and facial bones

Irregular bones

Shape of patella

Sesamoid bones

Any projection from surface of bone

Process

An opening or hole in bone

Foramen

A tube-like passageway within a bone

Meatus

A space within a bone

Sinus

Depression or groove in a bone

Fossa

"Knuckle" large rounded part of a bone

Condyle

Elevated, rounded part of a bone

Tuberosity

Large blunt process/ found on femur

Trochanter

Small rounded process/found on humerus

Tubercle

Bones that lie across the axis of the body; 80 bones; (skull, hyoid, sternum, ribs, vertebrae)

Axial skeleton

Bones of extremities (arms and legs)

Appendicular skeleton

Forms the forehead

Frontal bone

Forms greater portion of sides and roof of cranial cavity

Parietal bone

Posterior/prominent portion of base of cranium

Occipital bone

Large opening in occipital bone- for spinal cord

Foramen magnum

Joins with C1 (cervical vertebrae 1)

Occipital condyle

Forms inferior sides of cranium/part of cranial floor

Temporal bone

Passageway to inner ear

External auditory meatus

Depression where mandible fits

Mandibular fossa

Round, behind ear; sternocleidomastoid

Mastoid process

Attachment of tongue ligaments; pointed

Stupid process

Bat shaped;in middle of base of skull; connects to all other cranial bones

Sphenoid bone

Spongy bone located between orbits, makes up structure of nasal cavity

Ethmoid bone

Soft spots, allows for brain growth

Fontanels

Joints of skull, immovable

Sutures

Cheek bones, outer walls of orbits

Zygomatic bone

Part of cheek bone, extends to temporal bone

Zygomatic arch

Upper jaw, joins with every bone except mandible

Maxillary bone

Lower jaw, largest/strongest bone in face, only moveable one

Mandible bone

Fits into mandibular fossa, creating TMJ joint

Mandibular process

For ligament attachment in face

Coranoid process

Forms bridge of nose

Nasal bone

Tear bones, supports lacrimal glands

Lacrimal bone

L-shaped bones, forms hard palate

Palatine bone

Gives support to mucous membranes

Inferior nasal conchae

Makes up nasal septum

Vomer

U-shaped bone suspended from styloid process by ligaments

Hyoid bone