Skeletal System - Linn-Benton Community...
Transcript of Skeletal System - Linn-Benton Community...
Pelvic and Pectoral Girdles
Skeletal System
Skull
Thoracic cage
(ribs and sternum)
(a) Anterior view
Cranium
Sacrum
Vertebral
column
Clavicle Scapula Sternum Rib Humerus Vertebra
Radius Ulna Carpals
Phalanges Metacarpals Femur
Patella
Tibia
Fibula
Tarsals Metatarsals
Phalanges
The Pelvic Girdle
Components
Ossa coxae (hip bones)
Ilium
Ischium
Pubis
Function
Supports trunk
Leg attachment
Pelvic Girdle
Bony pelvis
Ossa coxae
Sacrum
Coccyx
Pelvic Girdle
Female Male
General structure Less massive Massive, robust, heavy
Sacrum Broad, less curved Narrow, more curved
Symphysis Shallow Wide
Pelvic inlet Larger, circular Narrower, heart shaped
Pelvic outlet Wide, ischial spines spaced Narrow, ischial spines close
Pubic arch Obtuse angle >90° Acute angle <90°
Obturator foramen Triangular Oval
Iliac crest Low High
Pectoral Girdle
A.k.a. Thoracic or shoulder girdle
Components
Clavicle
Scapula
Function
Attach upper limbs to axial skeleton
Attachment points for muscles
Questions?
Study Hard!