Pig Dissection of the Fetal Pig: Digestive and Respiratory System

Digestive and Respiratory System

epiglottis

Prevents food from entering the trachea during swallowing

larnyx

Voice box located above the trachea, vital for sound production

thymus

Site of maturation of T - cell lymphocytes

thyroid

Butterfly-shaped gland located in the neck that produces hormones necessary for development (T3 and T4)

diaphragm

Muscle used for rib cage ventilation (inhale/exhale)

lungs

Site of gas exchange between blood and atmosphere

liver

Storage of glycogen, detoxification of blood, bile production.

umbilical vein

Carries blood from placenta to developing fetus

umbilical arteries

Carry blood away from the fetus to the placenta.

gall bladder

Storage and release of bile into the duodenum

stomach

Acid and pepsin production, food storage, digestion

spleen

Filters blood, recycles iron

pyloric valve

Controls release of stomach contents to duodenum.

duodenum

Enzymatic breakdown of food

jejuno-ilium

Absorption of digestion products

pancreas

Makes hormones (insulin/Glucagon) and digestive enzymes

colon

Reabsorption o f water from waste

rectum

Stores waste prior to defecation