Frog Dissection

Question 1

Mouth

Answer 1

Large opening at anterior end of head made up of a maxilla and mandible

Question 2

Maxilla

Answer 2

The upper jaw bone

Question 3

Mandible

Answer 3

The lower jaw bone

Question 4

External nares (nostrils)

Answer 4

Two small openings on dorsal surface of head near tip

Question 5

Eyes

Answer 5

Protrude from head posterior to external nares

Question 6

Nictitating membrane

Answer 6

Extension of Lower eyelid that can come up to protect the eye

Question 7

Tympanum

Answer 7

Eardrum round membranes posterior and ventral to eyes

Question 8

Trunk

Answer 8

Posterior end of frog extending from head to hind limbs

Question 9

Cloacal opening

Answer 9

Hole at posterior end of frog

Question 10

Appendages

Answer 10

Limbs that extend from trunk including forelimbs and hind limbs

Question 11

Forelimbs

Answer 11

Short extensions from anterior end of trunk

Question 12

Arm

Answer 12

Uppermost section of forelimb extending from shoulder to elbow

Question 13

Forearm

Answer 13

Middle section of forelimb extending outward from wrist

Question 14

Hind limbs

Answer 14

Long extensions from posterior end of trunk

Question 15

Thigh

Answer 15

Uppermost section of hindlimb extending from hips to knee

Question 16

Shank

Answer 16

Middle section of hindlimb extending from knee to ankle

Question 17

Foot

Answer 17

Lowermost section of hindlimb extending outward from ankle

Question 18

Digits

Answer 18

Fingers and toes

Four finger digits and five toe digits

Question 19

Skin

Answer 19

Outer covering of head trunk and appendages

Smooth and moist

Question 20

Epidermis

Answer 20

Outer layer of skin containing pigment granules for coloration

Question 21

Dermis

Answer 21

Layer under epidermis containing chromatophores (example: pigment cells)

Question 22

Maxillary teeth

Answer 22

Row of teeth found on margin of maxilla

Question 23

Vomerine teeth

Answer 23

Two small patches of teeth found on roof of mouth in center of anterior area

Question 24

Internal nares

Answer 24

Nostril openings on roof of mouth in center of anterior area

Question 25

Eye sockets

Answer 25

On roof of mouth where eyes bulge inward

Question 26

Eustachian tubes

Answer 26

Openings for tunes are found ok each side of roof of mouth near hinge of jaws

Question 27

Esophagus

Answer 27

At back of mouth | Leads down throat to stomach

Question 28

Glottis

Answer 28

Opening for trachea | Anterior to opening of esophagus on floor of mouth

Question 29

Tongue

Answer 29

Found on floor of mouth | Hinged at anterior end

Question 30

Buccal cavity

Answer 30

Inside cavity of the mouth

Question 31

Dissection of hindlimbs

Answer 31

Remove skin from one of hindlimbs | Remove thigh muscles from femur and calf muscles from the tibiofibula

Question 32

Thigh muscles

Answer 32

Muscles of thigh

Question 33

Calf muscles

Answer 33

Muscles of shank

Question 34

Femur

Answer 34

Bone running through thigh

Question 35

Tibiofibula

Answer 35

Bone running through shank

Question 36

Achilles' tendon

Answer 36

Tendon that connects calf muscles to foot (white in color)

Question 37

Head

Answer 37

The anterior end of the frog extending to and including the eardrums

Question 38

Dissection of coelom

Answer 38

Place frog on back Using forceps, lift skin of lower abdomen and make a cut with the scissors Insert scissors into slit and make cut from near cloacal opening to below the Lower jaw Make shallow cuts to sides posterior to forelimbs and anterior to hindlimbs Make similar cuts through body wall if previous cuts did not do so Cut off flaps to reveal organs inside coelom Remove organs on tray for identification

Question 39

Teasing needle

Answer 39

Used to pull away or shred

Question 40

Dissecting needle

Answer 40

Coverslips of dissection Thrown away after dissection Used to pin down a critter

Question 41

Forceps

Answer 41

Tweeter looking item Used to remove things from organism Used to tease back membranes

Question 42

Heart (Atria and ventricle)

Answer 42

In center at anterior end between forelimbs Atria-red brown Ventricle- white

Question 43

Liver

Answer 43

On both sides of heart Contains three lobes(sections) Largest organ Brownish or greenish

Question 44

Gallbladder

Answer 44

Under liver and attached to it Small round sac Produces bile

Question 45

Esophagus

Answer 45

Attached to back of throat and stomach Cut as high up as you can Do not separate from stomach White

Question 46

Stomach

Answer 46

Widest part of digestive tract Very muscular white (Cut open stomach)

Question 47

Small intestine

Answer 47

Extends from stomach to large intestine | Smaller diameter than large intestine but longer

Question 48

Large intestine

Answer 48

Extends from small intestine to cloaca

Question 49

Cloaca

Answer 49

Very end of digestive tract | Cut as low down as you can

Question 50

Mesentery

Answer 50

Connective tissue holding different area of small intestine together Very thin but strong

Question 51

Spleen

Answer 51

Round body similar in size to the heart Found in Mesentery Makes red blood cells Dark reddish brown

Question 52

Lungs

Answer 52

To right and left of heat underneath liver | Spongy sacs

Question 53

Kidneys

Answer 53

Long flat structures along dorsal surface of coelom near posterior end of cavity

Question 54

Fat bodies/ ovaries/ testes

Answer 54

Yellow or brown wormlike structure in mid abdominal area (ovaries are too small to see and testes will be small, oval and white)