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Chap 7 – Skeletal System Part III

Homework: Finish reading Chap 7. Study all notes & diagrams from the entire chapter. Complete all questions in textbook. Chap 7 – Skeletal System Part III. *Learning Objectives continued Today: Upper limbs Pelvic girdle Lower limbs. proximal. CSI – Can You Name The Bone?.

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Chap 7 – Skeletal System Part III

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  1. Homework: Finish reading Chap 7. Study all notes & diagrams from the entire chapter. Complete all questions in textbook. Chap 7 – Skeletal SystemPart III *Learning Objectives continued Today: Upper limbs Pelvic girdle Lower limbs

  2. proximal CSI – Can You Name The Bone? • This bone was found in someone’s backyard accidentally (by their dog) and determined to be of human origin. • It is approx. 12” in length with a small ball-in-socket type head on the proximal epiphysis. • The distal epiphysis (epiphysis = end of the bone) is broad. What bone do you believe this to be? distal

  3. CSI: Radius or Ulna? 2 In a disarticulated skeleton, it can be challenging to differentiate the radius from the ulna. Can you tell them apart? 1 Ulna is slightly longer than the radius; thin at the head (proximal end) & broad at the distal end Radius is just the opposite…broad at head (proximal end) & thin at the distal end.

  4. Exploring the Bone of the Upper Limbs, pg 146 Instructions: Work individually. How many bones form the arm? How many individual bones can you actually count/ identify? Write the number down here next to this slide. You may use page 146 in your textbook for assistance.

  5. Metacarpals, pg 147 • Five numbered (1-5) metacarpal bones radiate from the _____ to form the _____. • Their bases articulate with the carpals proximally, and with each other medially and laterally • Heads articulate with the phalanges

  6. Phalanges, pg 147 • Each hand contains __ miniature long bones called phalanges • Fingers (digits) are numbered 1-5, beginning with the thumb (pollex) • Each finger (except the thumb) has three phalanges – distal, middle, and proximal • The thumb has no middle _________

  7. Bones of the Hand & Wrist, pg 147 Label your practice diagram (all parts). Helpful tips to remember carpals: “Sally Left The Party To Take Cathy Home” Word meanings: Scaphoid – boat-shaped Lunate – moon shaped Triquetral – triangular Pisiform – pea shaped Capitate – head shaped Hamate - hooked

  8. Lower Body: Pelvic (Hip) Girdle • The hip is formed by a pair of hip bones (os coxae, or coxal) • Together with the ______ and the______, these bones form the bony pelvis • There are numerous important bone markings on the pelvis (lets look at some…)

  9. Pelvic Girdle & Bone Markings,pg 150 Iliac crest Label your practice diagram with the following: ilium Base of Sacrum sacrum coccyx Obturator foramen acetabulum pubic symphysis (cartilage) ischium pubis

  10. CSI: Comparison of Male and Female Pelvic Regions • Female pelvis • - Tilted forward, adapted for childbearing • - True pelvis defines birth canal • - Cavity of the true pelvis is broad, shallow, and has greater capacity • Male pelvis • - Tilted less forward • - Adapted for support of heavier male build and stronger muscles • - Cavity of true pelvis is narrow and deep

  11. Comparison of Male and Female Pelvic Structure • Less movable; curves ventrally • More movable; straighter http://ect.downstate.edu/courseware/haonline/labs/l44/os0102.htm

  12. Review (Thus Far)Instructions: Write your answers next to this slide in your notes. Be prepared to discuss orally if called upon. (Know for test!) • Distinguish the ileum from the ischium. • Explain at least 3 ways to determine if pelvic skeletal remains are male or female. • List and briefly describe the 8 bones of the wrist. • Explain all the ways you know to differentiate the radius from the ulna.

  13. Femur • Largest, ______, and _______ bone in the body. • Has large ball like _____ that _______ into an area called the acetabulum (area where femur is secured into hip) • Numerous important bone markings articulates

  14. Femur with Bone Markings Label red circled structures only. Label now & memorizemarkings.

  15. Lower Limbs Q - Which one is the tibia? a b

  16. Getting to Know the Bones of the Foot Instructions: Match up the letter of the correct answer for each item. Write your answers next to this slide. Refer to pages 153 if needed to complete this exercise. • Great toe • No. of phalanges • No. of tarsal bones • Heel bone • No. of bones in the metatarsal area • Ankle • 7 • 5 • Tallus • 14 • Hallux • calcaneus

  17. Bones of the Foot, pg 153 • Label your practice diagram now. Label only red circled structures.

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