What is the main role of a mesentery? Differentiate among foregut, midgut, and h
ID: 3517252 • Letter: W
Question
What is the main role of a mesentery?
Differentiate among foregut, midgut, and hindgut.
What are the roles of the lips and cheeks? Of the tongue? Of the hard palate? Of the soft palate?
Differentiate among the different tooth regions. Differentiate among the different tooth layers.
Differentiate between intrinsic and extrinsic salivary glands. List the three extrinsic salivary glands, and differentiate them by location.
Differentiate among the esophagus, stomach, small intestine, and large intestine in terms of functions and wall structure.
Identify the different sphincters of the digestive tract. Specify the location and role of each, and whether it is made up of smooth muscle or skeletal muscle.
What functions as the upper esophageal sphincter?
Name and differentiate among the different regions of the stomach.
Specify the different ways the internal surface is maximized.
Name and differentiate among the different regions of the small intestines.
Name and differentiate among the different regions of the large intestines.
What blood vessel/s carry blood into the liver? Where does the blood come from?
What blood vessel/s carry blood away from the liver? Where does the blood go to?
Name the ducts connecting the liver, pancreas, gall bladder, and small intestines, and describe how they are connected to each other.
Which parts of the digestive and respiratory systems are retroperitoneal?
Specify the parts of the digestive system that develop from each of the three embryonic germ layers.
How does aging affect the structure and function of the digestive system?
How does aging affect the structure and function of the respiratory system?
How does aging affect the structure and function of the cardiovascular system?
How are the liver, pancreas, and lungs similar in their development?
Explanation / Answer
The mesentary is a continuous set of tissues that attaches the intestine to the abdominal wall in human and is formed by double fold of peritonium. It helps in storing fat and allowing blood vessels, lymphatics and nerves to supply the intestine.
Foregut, midgut and hindgut.
Foregut- the foregut is the anterior part of the alimentary canal, from mouth to duodenum at the entrance of bile duct, and is attached to abdominal walls by mesentary.
The foregut arises from endoderm.
Midgut- the midgut is the portion of the embryo from which most of the intestines develop. When it bends around the superior mesentric artery, it is called "midgut-loop". It is the portion of alimentary canal from end of foregut at the opening of bile duct to the hindgut.
Hindgut- hindgut is the posterior part of the alimentary canal. In mammals, it includes the distal third of the transverse colon and the splenic flexure, the descending colon, sigmoid color and rectum. The hindgut refers also to the cecum and ascending colon.
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