1. Skeletal System Thorax
Anatomy

2. Bony Thorax Chest Part of vertebrate, ribs, sternum Protects organs
Provides support

3. Sternum
Flat bone
3 important markings (jugular notch, sternal angle, xiphisternal joint)

4. Ribs 12 pairs Attach directly to sternum  true ribs (7 pairs)
Attach indirectly to sternum  false ribs (5 pairs)
No anterior attachment to sternum  Floating ribs

6. Appendicular Skeleton
Limbs and their girdles
Carry out movements

7. Pectoral (Shoulder) Girdle
Clavicle
Scapula

8. Pectoral (Shoulder) Girdle
Clavicle
Collarbone
Anchors muscles
Not very strong
Can damage subclavian artery
Sensitive to muscle pull

9. Pectoral (Shoulder) Girdle
Scapula
Shoulder blade

10. Upper Limb (Arm) Humerus Tubercle (where muscles attach)
Longest, largest, bone of upper limb
Supracondylar ridges- ulnar nerve runs behind it (Funny bone)

12. Forearm
Contain ulna and radius
Connected by a membrane
Form an “X”

13. Ulna
Longer of the forearm bones
Forms the elbow joint

15. Radius Anchors the biceps Major forearm bone with wrist joint
When radius moves…the hand moves

16. Hand
Includes the carpus (wrist) and phalanges (fingers)

17. Carpus 8 bones Very flexible
Scaphoid, lunate, triquetral, pisform, trapezium, trapezoid, capitate, hamate
Sally left the party to take Cathy home

19. Carpal Tunnel Syndrome
Carpus is concave and a ligament is above the cavity
Forms a tunnel
Nerves and tendons crowd this tunnel
Overuse cause them to swell  compresses nerve/causes numbness

21. Metacarpus (Palm) Small, long bones are not named
Form the knuckles when you make a fist
Metacarpal 1  thumb

22. Phalanges Fingers, digits Thumb  pollex
Third finger is longest in most people
Except for thumb each finger has 3 phalanges