Lab Practical 2- Origin/Insertion/Function: BULLFROG

Question 1

Longissimus Dorsi (Epaxial myotomes)

Answer 1

Origin: myosepta and transverse processes of vertebrae

Insertion: myosepta and transverse processes of vertebrae

Function: flexes the vertebral column laterally

Question 2

Hypaxial musculature: External oblique

Answer 2

Origin: transverse processes of trunk vertebrae

Insertion: connective tissue of rectus abdominus

Function: compresses the coelom and flexes and rotates the trunk

Question 3

Hypaxial musculature: Internal oblique

Answer 3

Origin: transverse processes of trunk vertebrae

Insertion: connective tissue of rectus abdominus

Function: compresses the coelom and flexes and rotates the trunk

Question 4

Hypaxial musculature: Rectus abdominus

Answer 4

Origin: pubic cartilage

Insertion: ribs

Function: flexes the trunk vertically

Question 5

Pectoralis

Answer 5

Origin: linea alba and coracoid cartilage

Insertion: humerus

Function: adducts forelimb

Question 6

coracoradialis (sternoradialis)

Answer 6

Origin: coracoid cartilage

Insertion: humerus

Function: adducts forelimb

Question 7

Deltoid

Answer 7

Origin: suprascapular cartilage

Insertion: humerus

Function: elevates the forelimb

Question 8

Anconeus

Answer 8

Origin: glenoid fossa, humerus, and coracoid cartilage

Insertion: ulna

Function: extends forearm

Question 9

latissimus Dorsi

Answer 9

Origin: fascia of epibranchial muscles

Insertion: shoulder and proximal end of humerus

Function: draws humerus caudad

Question 10

Dorsalis scapulae

Answer 10

Origin: Suprascapula.

Insertion: Humerus

Function: Protracts the forelimb

Question 11

Forearm flexors

Answer 11

Origin: Distal end of humerus

Insertion: metacarpals/digits

Function: extends the manus

Question 12

Forearm extensors

Answer 12

Origin: humerus

Insertion: digits

Function: flexes the manus

Question 13

Submaxillary (myohyloid)

Answer 13

Origin: mandible

Insertion: hyoid

Function: elevates floor of throat

Question 14

Geniohyoid

Answer 14

Origin: mandible

Insertion: hyoid

Function: depresses lower jaw and draws hyoid cranially

Question 15

Hyoglossus

Answer 15

Origin: Hyoid

Insertion: Side of the tongue

Function: Depresses tongue

Question 16

Temporalis

Answer 16

Origin: tympanic bones of skull

Insertion: the lower jaw, dentary bone

Function: Close the mouth (adduct the lower jaw)

Question 17

Depressor Mandibulae

Answer 17

Origin: third branchial arch

Insertion: posterior end of mandible

Function: depresses lower jaw