Axial skeleton skull (cranium and facial bones) hyoid bone (anchors tongue and muscles associated with swallowing) vertebral column (vertebrae and disks)

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Presentation transcript:

Axial skeleton skull (cranium and facial bones) hyoid bone (anchors tongue and muscles associated with swallowing) vertebral column (vertebrae and disks) thoracic cage (ribs and sternum) Appendicular skeleton pectoral girdle (clavicles and scapulae) upper limbs (arms) pelvic girdle (coxal bones, sacrum, coccyx) lower limbs (legs)

________________________ 22 bones in skull 6 in middle ears 1 hyoid bone 26 in vertebral column 25 in thoracic cage + 4 in pectoral girdle 60 in upper limbs 60 in lower limbs 2 in pelvic girdle ________________________ 206 bones in all Axial Appendicular

The Skull 8 sutured bones in cranium Facial bones: 13 sutured bones, 1 mandible Cranium encases brain attachments for muscles sinuses

Parietal (top and sides) Frontal (forehead) Occipital (base of skull) The Skull Bones to know: Parietal (top and sides) Frontal (forehead) Occipital (base of skull) Zygomatic (cheek bones) Temporal (above ears) Sphenoid (between zygomatic and temporal) Maxilla (upper jaw) Mandible (lower jaw) Foramen Magnum (hole in base of skull for spinal cord)

Allows for growth

Vertebral Column 7 cervical vertebrae 12 thoracic vertebrae 5 lumbar vertebrae 1 sacrum (5 fused bones) 1 coccyx (4 fused bones) = tailbone Vertebrae vary in size and morphology

Thoracic Cage 12 pairs of ribs 12 thoracic vertebrae sternum costal cartilages True ribs are directly attached to the sternum (first seven pairs) 3 false ribs are joined to the 7th rib 2 pairs of floating ribs

Clavicles and Scapulae Help brace shoulders Attachment sites for muscles

Bones of upper limb Humerus (upper arm) Radius, ulna (lower arm) Carpals, metacarpals, phalanges (wrist, hands, fingers)

Bones of lower limb Femur (upper leg) Patella (kneecap) Tibia, fibula (lower leg) Tarsals, metatarslas, phalanges (ankles, feet, toes)

Types of Bones Long Short Flat Irregular Sesamoid

Types of Bones Long (longer than they are wide) *for movement - femur - tibia - fibula - humerus - radius - ulna - metacarpals - metatarsals - phalanges

Types of Bones Short (as wide as they are long) *for support and stability with little movement - carpals - tarsals

Types of Bones Flat (thin, flattened, and a bit curved) *provide protection to vital organs - sternum - most skull bones - scapula - pelvic bones - rib bones

Types of Bones Irregular (complicated shapes) - vertebrate - sacrum - mandible

Types of Bones Sesamoid (short or irregular bones, imbedded in a tendon) - patella - pisiform (smallest of the carpals) - two small bones at the base of 1st metatarsal