Porcine Laboratory 10

Question 1

What is the dental formula for domestic pigs?

Answer 1

I 3/3
C 1/1
PM 4/4
M 3/3

Question 2

What are fetal pig teeth called? How many are they born with?

Answer 2

needle teeth
8

Question 3

What is this called?

Answer 3

needle teeth

Question 4

What kind of teeth do domestic pigs have?

Answer 4

brachydont

Question 5

Label 1-8

Answer 5

1. incisors
2. canine
3. premolars
4. molars
5. incisors
6. canine
7. premolars
8. molars

Question 6

What is the nose bone of the pig commonly referred as?

Answer 6

os rostrum

Question 7

What is the function of the os rostrum?

Answer 7

plays a role in the pig’s sense of smell and in its ability to root around in the soil for food

Question 8

Cows and horses are [hypsodont/brachydont], and pigs are [hypsodont/brachydont]

Answer 8

cows and horses: hypsodont

pigs: brachydont

Question 9

Label 1-3

Answer 9

1. oropharynx
2. laryngopharynx
3. nasopharynx

Question 10

What is this called in the pig?

Answer 10

diverticulum ventriculi

Question 11

T/F: A pig stomach is monogastric

Answer 11

TRUE - single chambered stomach

Question 12

What are the aglandular regions of the pig stomach?

Answer 12

cardia
esophagus

Question 13

What are the glandular regions of the pig stomach?

Answer 13

fundus
pylorus

Question 14

What is the route of ingesta from the esophagus to rectum in the pig GI tract?

Answer 14

esophagus —> stomach (single chamber) —> small intestinal loops —> cecum —> spiral colon (aka ascending colon) —> transverse colon —> descending colon —> rectum

Question 15

The first part of the ascending colon is called the ______. Where does it travel to next?

Answer 15

centripetal loop
spirals towards the central flexure

Question 16

After the central flexure, where does ingesta travel through?

Answer 16

centrifugal loop
away from central flexure

Question 17

The porcine spiral colon is shaped like a ____, as opposed to a “hurricane” shape like the ruminant spiral colon

Answer 17

tornado

Question 18

What is this structure?

Answer 18

central flexure

Question 19

What is this structure?

Answer 19

cecum

Question 20

Label 1-5

Answer 20

1. small intestines
2. spiral colon (large intestines)
3. cecum
4. liver
5. spleen

ileocecal fold in picture somewhere

Question 21

How are boar testes and scrotum oriented?

Answer 21

oblique-angled

Question 22

What is the shape of the boar penis?

Answer 22

corkscrew

Question 23

Label 1-5

Answer 23

1. glans penis
2. slit-like external osmium of urethra
3. tendinous cord
4. small veins
5. tendinous cord

Question 24

List the anatomy of the pig scrotum from external to internal

Answer 24

skin
tunica dartos
external & internal spermatic fascia
parietal vaginal tunic
vaginal cavity
visceral vaginal tunic
tunica albuginea

Question 25

Label 1-5

Answer 25

1. testes
2. head of the epididymis
3. proper ligament of the testes
4. tail of epididymis
5. body of epididymis

Question 26

Label 1-7

Answer 26

1. mesosalpinx
2. uterine tube
3. mesometrium
4. uterine body
5. uterine horn
6. uterine horn
7. mesometrium

Question 27

What are these structures called?

Answer 27

cervix with cervical rings

Question 28

Label 1-3

Answer 28

1. cervix
2. vagina
3. vestibule

Question 29

What is the litter size range for pigs?

Answer 29

8-12 piglets

Question 30

Artiodactylids are [even/odd]-numbered digits and perissodactylids are [even/odd]-numbered digits

Answer 30

artiodactylids: even

perissodactylids: odd

Question 31

Pigs are [artiodactylids/perissodactylids]

Answer 31

artiodactylids - even-numbered toes

Question 32

Pig species bear body weight on ____ toes of each thoracic and each pelvic limb

Answer 32

4

Question 33

What are the pig dewclaw numbers?

Answer 33

2
5

Question 34

Pigs have a total of ___ digits on the manus and ____ digits on the pes

Answer 34

4 for both