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A&P:I:Appendicular
Question | Answer |
---|---|
The Pectoral Girdle (shoulder girdle) | Connects the arms to the body Positions the shoulders Provides a base for arm movement |
What does the pectoral consist of and where does it connect with axial skeleton? | Consists of: 2 clavicles 2 scapulae Connects with the axial skeleton only at the manubrium |
The Clavicles (collarbones) | Long, S-shaped bones Originate at the manubrium (sternal end) Articulate with the scapulae (acromial end) |
The Scapulae (shoulder blades) | Anterior surface-subscapular fossa Broad, flat triangles Articulate with arm and collarbone |
WHat does the scapulae known for? | To hold the glenoid cavity which articulates with humerus to form shoulder joint |
Humerus-arm | The long, upper armbone |
Head of humerus | rounded, articulating surface contained within joint capsule |
Neck of humerus | Anatomical neck- margin of joint capsule Surgical neck: the narrow metaphysis |
Shaft of humerus | Deltoid tuberosity: -a bulge in the shaft -attaches deltoid muscle Radial groove: -for radial nerve -posterior to deltoid tuberosity |
Distal Epiphysis of humerus | Medial and lateral epicondyles: -for muscle attachment Condyle of the humerus: =Trochlea: coronoid fossa & olecranon fossa articulates with ulna =Capitulum: radial fossa articulates with radius |
Ulna | Articulations =With humerus ==Forearm extended: olecranon (elbow point) enters olecranon fossa ==Forearm flexed: coronoid process enters coronoid fossa |
The Forearm-antebrachium | Consists of 2 long bones: ulna & radius |
Radius | Articulations Ulnar notch: distal end articulates w/ wrist & radius Styloid process: stabilizes wrist joint |
Wrist | 8 carpal bones: |
Hands | =5 Metacarpal Bones long bones of the hand Numbered I–V from lateral (thumb) to medial Articulate with proximal phalanges =Phalanges Pollex (thumb): 2 phalanges (proximal, distal) Fingers: 3 phalanges (proximal, middle, distal) |
Hipbones - Os Coxae | Made up of 3 fused bones: ilium ischium pubis Acetabulum - hip socket articulates with head of femur |
Marks of Os coxae | Marks =Obturator foramen: formed by ischial and pubic rami attaches hip muscles =Pubic symphysis: gap between pubic tubercles padded with fibrocartilage |
The Pelvis | Consists of 2 ossa coxae, sacrum, & coccyx |
What two things bind at the pelvis? | appendicular and axial |
True Pelvis | Perineum region: inferior edges of true pelvis Pelvic brim: upper edge of true pelvis encloses pelvic inlet |
Childbearing Modifications | Due to above, female pelvis is smoother & lighter Enlarged pelvic outlet Broad pubic angle (> 100°) Less curvature of sacrum and coccyx Wide, circular pelvic inlet Broad, low pelvis Ilia project laterally, not upwards |
Femur | Proximal Epiphysis Femoral head: articulates with pelvis at acetabulum Neck narrow area between head & trochanters |
Shaft of femur | Linea aspera: most prominent ridge of shaft attaches hip muscles |
patella | Base attaches quadriceps femoris Apex attaches patellar ligament |
tibia | Proximal Epiphysis Medial and lateral tibial condyles articulate with medial & lateral condyles of femur Tibial tuberosity: attaches patellar ligament |
tibia shaft | Shaft Anterior margin: sharp ridge of shinbone |
Distal epiphysis of tibia | Medial malleolus: medial projection at ankle |
Fibula | Interosseous membrane: binds fibula to tibia Lateral malleolus: lateral projection of ankle |
Interosseous membrane happens also where? | ulna and radius |
Ankle | of 7 tarsal bones |
feet | 5 metatarsal bones: long bones of foot numbered I–V, medial to lateral Articulate with toes phalanges: bones of the toes hallux: big toe, 2 phalanges (distal, proximal) Other 4 toes: 3 phalanges (distal, medial, proximal) |
Arm proximal epiphysis | separated by intertubercular groove: greater tubercle: lateral forms tip of shoulder lesser tubercle: anterior, medial |