Fetal Pig External Anatomy and Digestive System (Lab 8)

Head

5

Neck

4

Trunk (Thorax and Abdomen)

3

Abdomen

2

Tail

1

Auricles

9

External portion of the ear

Nostrils

7

Nictitating Membrane (Third Eyelid)

6

transparent membrane present in some animals that is used for protection and to moisten the eye while also permitting some visibility

Epitrichium

outer layer of epidermis in the fetus, hair develops beneath this

Umbilical Cord

1

N1pples (mammary papillae)

3

Anus

5

Urogenital opening (male)

2

Scrotal Sac

4

Genital Papilla and Urogenital Opening (female)

6

Teeth

1

Papillae

8

projections on tongue containing taste buds

Hard Palate

2

Soft Palate

3

Pharynx

shared structure between respiratory and digestive system

Mouth

anterior opening to digestive system of pharynx

Esophagus

3

posterior opening to digestive system of pharynx

Nasal Chamber

4

Anterior opening to the respiratory system that allows air to enter and exit the nasal passages of pharynx

Glottis

6

posterior opening to larynx of pharynx

Epiglottis

7

Larynx

1

voice box in humans

Trachea

2

respiratory tube reinforced with cartilage

Esophagus

3

Digestive muscular tube running behind trachea serving as a passageway for food into the stomach

Thyroid Gland

2

involved in producing thyroid hormones which play a role in regulating the rate of metabolism

Thymus Gland

1

plays a role in immunity

Peritoneum

layer made of simple squamous epithelia forming the lining of the abdominal cavity

Parietal Peritoneum

outer layer lining internal body wall (abdominal wall and pelvic cavity)

Visceral Peritoneum

inner layer covering internal organs that are in intraperitoneal cavity

Diaphragm

muscular layer seperating thoracic cavity from abdominal cavity

Liver

5

involved in filtering harmful substances from the blood and producing bile

Gallbladder

2

stores and concentrates bile produced by the liver

Stomach

4

produces gastric juice which breaks down proteins

Spleen

3

involved RBC desctruction and filtering blood (removing microbes) as part of the lymphatic system

Greater Curvature

left lateral and interior part of the stomach

Lesser Curvature

right medial part of the stomach

Cardiac Sphincter

band of smooth muscles regulating the passage of food from the esophagus to the stomach

Pyloric Sphincter

band of smooth muscles regulating the passage of food from the stomach to the duodenum

Gastric Rugae

longitudinal folds in musoca layer of the stomach

Pancreas

7

produces some digestive fluids as well as hormones (insulin and glucagon)

Small Intestine

1

includes duodenum, Jejunum and Ileum

Duodenum

3

first section of SI- makes digestive enzymes to break down food, receives secretions from gall bladder and pancreas

Common Bile Duct

(flower stem like structure under the gallbladder) cystic duct from the gall bladder and hepatic duct from liver

Jejunum and Ileum

designed to increase surface area for more absorption of nutrients

Lumen

central cavity of the gut

Villi

finger like projections of wall of the small intestine into the lumen

Mucosa

innermost layer or GI tract containing epithelium functioning in absorption and secretion

Microvilli

microscopic hair-like projections consisting of foldings of cell membrane of musoca epithelial cells

Lymph Nodules

group of lumphocytes located in submucosa

Circular Muscle

inner thick muscle of J&I

Longitudinal Muscle

thin outer muscle layer of J&I

Serosa

outermost layer of GI tract consisting of simple squamous epithelium, comprises the visceral peritoneum and intestine

Mesenteries

sheets w/ 2 layers of visceral peritoneum joining together loops of intestine and suspending them in abdominal cavity, same composition of serosa layer (Blood and sheets of peritoneum are inbetween these two layers)

Large Intestine (colon)

2

Cecum

begining of large intestine, consists of blind pouch receiving waste material from ileum of small intestine and passes it to the colon, Plays a role in increasing the amount of time for food digestion and absorption

Rectum

last portion of colon functioning in storing solid waste until excretion