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Body Structure:
Body Structure and Processes - Pectoral Girdle - 7/10/24
Question | Answer |
---|---|
appendicular skeleton comprised of? | pectoral girdle upper limb bones pelvic girdle lower limb bones |
what do the girdles connect? | limbs to the trunk |
bones in the pectoral girdle? | clavicle and scapula |
pectoral girdle is the site of articulation for what? | axial skeleton and upper limbs |
describe the pectoral girdle anteriorly | articulates with manubrium of the sternum |
describe the pectoral girdle posteriorly | no articulation and position maintained by muscle |
clavicle? | s shaped bone articulates with the manubrium of sternum at sternal end articulates with acromion of scapula at acromial end |
clavicle articulates with the manubrium of the sternum at what end? | sternal end |
clavicle articulates with the acromion of the scapula at what end? | acromial end |
sternal end? | where clavicle articulates with manubrium of sternum |
acromial end? | where clavicle articulates with acromion of scapula |
scapula singular? | scapulae |
describe the shape of scapula | large triangular bones |
what about the scapula allow attachment of a large muscle mass? | superior, medial and lateral borders |
having superior, medial and lateral borders allow what in the scapula? | attachment of a large muscle mass |
where does the humerus articulate with the pectoral girdle | glenoid cavity |
glenoid cavity? | where humerus articulates with pectoral girdle |
where is the acromion and coracoid process found? | in scapula |
in scapula, what does the scapula spine do? | divides the bone |
what divides the bone in the scapula? | scapula spine |
what does the supra/infra spinous fossa do in the scapula? | facilitates muscle attachment |
what facilitates muscle attachment in the scapula? | supra/infra spinous fossa in the scapula |
describe the anatomical position of the radius and thumb | radius lies laterally and articulates at thumb |
describe the anatomical position of ulna and little finger | ulna lies medially and articulates at little finger |
what type of membrane connects the ulna and radius | interosseous |
how many bones are there in each wrist, palm and hand? | 27 |
number of bones in the carpus? | 8 |
how are the bones split in the carpus? | 4 proximal and 4 distal carpal bones in each hand |
what do the carpal bones articulate with? | metacarpals |
number of metacarpals in each hand? | 5 |
what do the metacarpals articulate with? | carpals and phalanges |
how many phalanges does each finger have? | 3 |
number of phalanges on each thumb (pollex) | 2 |
what has 3 phalanges? | fingers |
what has 2 phalanges | thumb (pollex) |
bones in the proximal carpals? | lunate scaphoid triquetrum pisiform trapezoid trapezium hamate capitate |
why is the pisiform bone hard to see? | small articulates with triquetrum bone so obstructed from view |
pisiform bone? | sesamoid bone not involved in wrist movement |
the pisiform bone articulates with what? | triquetrum bone |
remembering the proximal carpals? | so long to pinky here comes the thumb (C shape route starting from bottom right) |
how are metacarpals identified? | numbered 1-5 starting at thumb |
what is missing from the thumb? | middle phalanges |
what are the 3 types of phalanges? | proximal, middle and distal |