Trace the Pathway Unit 23

Trace pathway of egg through digestive system

Mouth- CHEWING of the egg by teeth and then swallowed traveling down the ESOPHAGUS into the STOMACH. In the stomach protein digestion first occurs with the help of PEPSINOGEN transformed into PEPSIN upon presence of HCL in the stomach. Pepsin digests the proteins into POLYPEPTIDES and FREE AMINO ACIDS. CHURNING of the stomach also aids in breakdown. The protein is further broken down in the SMALL INTESTINE with enzymes from the pancreas such as TRYPSIN, CHYMOTRYPSIN, andBRUSH BOARDER ENZYMES. The broken down amino acids are then absorbed in BLOOD CAPILLARIES of the small intestine. They then travel to the SUPERIOR MESENTERIC VEIN to the HEPATIC PORTAL VEIN to the HEPATIC PORTAL SYSTEM to the INFERIOR VENA CAVA.

Trace the pathway of Greasy food in the digestive system

Mouth- Chewing with teeth and then swallowed into esophagus then travels to stomach. In stomach churning occurs and gastric lipase is secreted. Then when reaches small intestine, lipids clump together forming fat "globules". Emulsification occurs with the help of bile salts and pancreatic lipase breaking down large fat globules into MONOGLYCERIDES and FREE FATTY ACIDS. The MONOGLYCERIDES are then made into triglycerides (making of bodys own fat). the triglycerides are then formed into CHYLOMICRONS where they are then absorbed into the lacteals. From the lacteals they enter the lymph vessels of the intestine then lymph trunk then mesenteric lymph nodes. From there they enter the interstitial trunk and go through the cisterna chyli. Then they enter the thoracic duct and left subclavian vein then the left brachioceohalic vein to the superior vena cava.

Trace the pathway of a cookie in the digestive system

Mouth- You CHEW the cookie with your teeth and SALIVARY AMYLASE begins to breakdown the carbohydrates present. This catalyzes the reaction to digest polysaccarides into smaller oligosacarides. Then the food travels down the ESOPHAGUS after being swallowed and enters the STOMACH. In the stomach churning occurs to make chyme. After leaving the stomach the remaining polysaccarides and oligosaccarides are digested within the SMALL INTESTINE with the assistance of PANCREATIC AMYLASE ENZYME (released from pancreas) and brush boarder enzymes within the brush boarder of the small intestine. The monosaccarides are then absorbed through the blood capillaries of the small intestine. Then it travels through the SUPERIOR MESENTERIC VEIN to the HEPATIC PORTAL VEIN. Then through the HEPATIC PORTAL SYSTEM to the HEPATIC VEIN and then to the INFERIOR VENA CAVA of the heart.