Skeletal System - “Lower Extremity”

Appendicular - Lower Extremity __ Total Bones Hipbone (1) = Femur (1) = 2 Tibia (1) = _______ (1) = 2 Patella (1) = 2 Tarsals (7) = __________ (5) = 10 Phalanges (14) =

Pelvic Girdle ______________ Formed by fusion of _____ bones Ilium (superior) Ischium (__________and posterior) ____________ (inferior and anterior) Strong and stable support for ____________ column

Ilium (superior) “Flank” Most ___________ and largest hipbone

Lateral View

Medial View

Ischium (inferior & posterior) “Hip” Inferior, posterior portion of the hipbone

Pubis (inferior & anterior) “______________ mature” Anterior and inferior part of the hipbone

Pelvis Together with the sacrum and coccyx, the two hipbones form the basin-like “Pelvis” Pelvic Brim / Inlet: seperates the superior and inferior portions of the pelvis is the superior boundary of pelvis oblique plane

Pelvic Brim / Inlet Plane from sacrum to sup. pubic symphysis

Female Pelvis Wide pelvic outlet Shallow Male Pelvis Narrow pelvic outlet Deep

Female Pelvis ______ pelvic outlet Shallow Pubic arch > 90-deg Male Pelvis __________ pelvic outlet Deep Pubic arch < 90-deg

Femur “Thighbone” _________, heaviest, and ______ bone in body Head of femur Proximally _________ with hipbone at the _______________ _________ articulates with tibia and patella

Femur – Proximal End Anterior

Tibia “__________Shinbone” Larger, medial bone of lower leg Bears _________ of body’s weighty Proximal articulation with _______ and __________ _________ articulation with fibula and talus

Tibia - Distal End Medial Malleolus “medial ankle bone” Anterior Fibular Notch Anterior

Fibula _______ “shinbone” Thinner and smaller than tibia Does not bear much bodyweight (non-weight bearing)

Patella “Kneecap” Largest ________bone Subcutaneous and easily _____________ Increases __________ for quadriceps muscles Lies anterior to distal femur

Tarsal Bones _____________ Talus Navicular ______________ Heel bone Most superior and articulates with tibia Navicular Lateral ______________ Medial (1st) Intermediate (2nd) Lateral (3rd)

Intermediate Cuneiform Lateral Cuneiform Intermediate Cuneiform Medial Cuneiform Navicular Cuboid Talus Calcaneus Superior

Metatarsals 5 per foot Numbered 1-5 from big toe to little toe ex: Big Toe “___________” =1 ex: Pinky Toe= 5 1 2 3 4 5

Phalanges 14 bones of the toes ____ per toe ____ per big toe Regions: ______________