A&P Lab VIII

True ribs (1-7)

false ribs (8-12)

floating ribs (11-12)

head of rib

neck of rib

tubercle (of rib)

angle (of rib)

shaft (rib)

manubrium

body of sternum

xiphoid process

levator scapulae

O: transverse processes of C1-C4 vertebrae

I: medial border of scapula

A: elevates scapula

pectoralis major

O: clavicle

I: greater tubercle of humerus

A: adducts arm

pectoralis minor

O: 3-5 ribs

I: coracoid process of scapula

A: Pulls scapula forward

serratus anterior

O: upper edge of 1st 8 ribs

I: costal surface of scapula

A: Rotates scapula

external intercostals

internal intercostals

diaphragm

Trapezius

latissimus dorsi

O: last 4 ribs

I: intertubercular groove of humerus

A: Extends arm

rhomboid major

rhomboid minor

Supraspinatus

O: supraspinous fossa of scapula

I: greater tubercle of humerus

A: initiates abduction of humerus

infraspinatus

O: infraspinous border of scapula

I: greater tubercle on humerus

A: rotates arm outward

teres major

teres minor

O: Lateral border of scapula

I: Greater tubercle of humerus

A: Rotates arm laterally

rectus abdominis

O: pubic crest

I: xiphoid process

A: compresses abdomen

external oblique

O: lower 8 ribs

I: iliac crest

A: Rotates trunk

internal oblique

transversus abdominis

linea alba

deep transverse perineal

superficial transverse perineal