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Lower Appendicular Skeleton. Pelvic Girdle Composed of sacrum, coccyx, and 2 coxae (hipbones) Coxae have 3 distinct parts: – Ilium – Ischium – Pubis.

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Presentation on theme: "Lower Appendicular Skeleton. Pelvic Girdle Composed of sacrum, coccyx, and 2 coxae (hipbones) Coxae have 3 distinct parts: – Ilium – Ischium – Pubis."— Presentation transcript:

1 Lower Appendicular Skeleton

2 Pelvic Girdle Composed of sacrum, coccyx, and 2 coxae (hipbones) Coxae have 3 distinct parts: – Ilium – Ischium – Pubis

3

4 Coxae parts fuse together in the acetabulum(acetabul-), a cup-shaped area on the lateral surface of the hip that receives the head of the femur.

5 Ilium Largest and uppermost portion of the coxa The upper edge is called the iliac crest Joins the sacrum at the sacroiliac joint Anterior superior iliac spine- the bony prominence you feel as your “hipbone”

6 Ischium Forms the lowest portion of the coxa Ischial tuberosity – Points posteriorly AND downward – Supports the weight of the body when sitting Ischial spine – a sharp projection above the ischial tuberosity, near the junction of the ischium and ilium

7 Pubis Anterior portion of the coxa Two pubic bones join midline at the symphysis pubis joint Pubic arch – Angle formed by pubic bones below the symphysis pubis – Arch is wider in females

8 Male vs. female

9 Lower Limb Femur Tibia Fibula Tarsals Metatarsals Phalanges

10 Femur Longest and strongest bone in the body Head at top fits into __________of coxa Greater trochanter – superior, lateral process Lesser trochanter – inferior, medial process Distal end: – Two rounded processes posteriorly: lateral condyle and medial condyle – Patella articulates anteriorly

11 Tibia aka, “shin bone” Proximal end: – Medial and lateral condyles are concave and articulate with condyles of the femur – Tibial tuberosity just below the condyles; attachment point for patellar ligament Distal end: medial malleolus forms prominent bony point of inner ankle

12 Fibula Proximal: head – Articulates with tibia just below the lateral condyle – DOES NOT enter into knee joint or bear any weight Distal: lateral malleolus forms outer prominent bony part of ankle

13 Ankle “Tarsals” “Tiger Cubs Need MILC” Talus Calcaneus (“heel bone”) Navicular Medial cuneiform Intermediate cuneiform Lateral cuneiform Cuboid

14 “MILC: Need The Calcium” 1=Medical Cuneiform 2=Intermediate cuneiform 3=Lateral cuneiform 4= Cuboid 5= Navicular 6= Talus 7= calcaneus

15 Foot 5 metatarsals – numbered 1-5 starting medially – Heads at distal ends form the ball of the foot Phalanges – Toes – Each toe has 3 phalanges, except the big toe – What are the phalanges of each toe called? (HINT: Just like the fingers) – Which phalanx is the big toe missing?

16 https://resources.oncourse.iu.edu/access/content/group/FA09-KO-OTHR-PRAC /Helpful%20Websites/Nicole_s%20Website%20Pages/Bones/Foot-tarsals.JPG


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