The Digestive System
Objective: Locate organs of the digestive system
Structures of the oral cavity and pharynx
Description: The hard palate is bony plate from the skull located in the roof of the mouth, and the soft palate is the soft tissue at the back of the roof of the mouth. The epiglottis is a flexible flap, it covers the glottis when a mammal swallows, it allows air to enter to the lungs and food to pass. The glottis is the part of the larynx were the vocal cords are located.
Description: The trachea is located in the neck, it is a tube that is kept open by a series of cartilaginous supports, it provides air flow from and to the lungs. This structure is part of the respiratory system but identifying it helps in the identification of the esophagus. The esophagus carries food, liquids, and saliva from the mouth to the stomach. The larynx is located between the pharynx and the trachea, and holds the vocal cords.
Internal anatomy of fetal pig:
Description: The liver is the largest organ of the abdominal cavity, one of its many functions is to secrete bile which helps carry away waste and break down fats in the small intestine. The gall bladder is a sac like organ that sores the bile secreted by the liver. The pancreas is located between the stomach and the small intestine. The stomach is a bean-shaped organ to the left of the liver, it secretes acids and enzymes that digest food and receives food from the esophagus.
Description: The small intestine is divided intro three regions: the duodenum, jejunum, and the ileum. 90% of the digestion and absorption of food occurs here. Its primary purpose is to absorb nutrients and minerals from food. The large intestine is where the other 10% of digestion occurs; its primary purpose is to absorb water from the remaining food. The spleen helps the immune system by acting as a filter for blood and helping it recognize foreign pathogens. The rectum acts as a temporary storage for feces before leaving the body
Small Intestine of the Fetal Pig
The small intestine is 75 cm long.