Diagram Of The Digestive Organs
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Diagram Of The Digestive Organs

Organs of the digestive system lab
1 Organs of the Digestive System Laboratory Exercise 49 Background The digestive system includes the organs associated with the alimentary canal and several accessory structures.

The alimentary canal, which is a muscular tube, passes through the body from the opening of the mouth to the anus.

It includes the oral cavity, pharynx, esophagus, stomach, small intestine, and large intestine.

The canal is adapted to move substances throughout its length.

It is specialized in various regions to store, digest, and absorb food materials and to eliminate the residues.

The accessory organs, which include the salivary glands, liver, gallbladder, and pancreas, secrete products into the alimentary canal that aid digestive functions.Materials Needed Textbook Human torso model Liver model Stomach model with pancreas Skull with teeth Tooth model Compound light microscope Prepared microscope slides of the following:

Parotid salivary ( intestine (jejunum)

Large intestine (colon) Purpose of the Exercise Review the structure and function of the digestive organs and examine the tissues of these organs microscopically.Procedure A

Mouth and Salivary Glands 1.

Label figures 49.1, 49.2, and 49.3.2.

Examine the mouth of the human torso model and the skull to locate the following structures:

oral cavity, vestibule, tongue, lingual tonsils, palate, palatine tonsils, pharyngeal tonsils (adenoids), gums (gingivae), teeth.

2 3.

Examine a tooth model and locate the following features:

crown, neck, root.4.

Observe the head of the torso and locate the following:

parotid salivary gland, parotid duct, submandibular salivary gland, submandibular duct, sublingual salivary gland.5.

Examine a microscopic section of a parotid gland, using low and high-power magnification.

Note the numerous glandular cells arranged in clusters around small ducts.

Also note a larger secretory duct surrounded by lightly stained cuboidal epithelial cells.

6.

Complete Part A of the laboratory report.Procedure B

Pharynx and Esophagus 1.

Label figure 49.4.2.

Observe the human torso model and locate the following features:

pharynx, epiglottis, esophagus, lower esophageal sphincter (cardiac sphincter).3.

Have your partner take a swallow from a cup of water.

Carefully watch the movements in the anterior region of the neck.

What steps in the swallowing process did you observe? 4.

Examine a microscopic section of the esophagus wall, using low-power magnification.

Note that the inner lining is composed of stratified squamous epithelium and that there are layers of muscle tissue in the wall.

Locate some mucous glands in the submucosa.

They appear as clusters of lightly stained cells.5.

Complete Part B of the laboratory report.Procedure C

The Stomach 1.

Label figures 49.5 and 49.6.

2.

Observe the human torso model and locate the following features:

rugae, cardiac region, fundic region, body region, pyloric region, pyloric canal, pyloric sphincter, lesser curvature, greater curvature.3.

Examine a microscopic section of the stomach wall, using low-power magnification.

Note how the inner lining of simple columnar epithelium dips inward to form gastric pits.

The gastric glands are tubular structures that open into the gastric pits.

Near the deep ends of these glands, you should be able to locate some intensely stained (bluish) chief cells and some lightly stained (pinkish) parietal cells.

What are the functions of these cells? 4.

Complete Part C of the laboratory report.

3 Procedure D

Pancreas and Liver and Gallbladder1.

Label figure 49.7.

2.

Observe the human torso model, liver model, and pancreas model and locate the following structures:

pancreas, pancreatic duct, liver, round ligament, falciform ligament, coronary ligament, gallbladder, hepatic ducts, common hepatic duct, cystic duct, common bile duct, hepatopancreatic sphincter.3.

Examine the pancreas slide, using low-power magnification.

Observe the exocrine cells that secrete pancreatic juice.

4.

Complete Part D of the laboratory report.Procedure E

Small and Large Intestines 1.

Label figure 49.8.2
diagram of the digestive organs
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Digestive System & Abdominopelvic Cavity I. The Digestive System The digestive system can be functionally divided into two primary sets of organs or organ systems … (harford.edu)
Digestive System Diagram
Digestive System Diagram . Large Intestine Mechanical Digestion Chemical Digestion Saliva ... His organs are removable but must be handled with care. Do This: (anatomyinstructor.com)
.

Observe the human torso model and locate each of the following features: small intestine, mesentery, ileocecal sphincter, large intestine, anal sphincter muscles, anus.3.

Using low-power magnification, examine a microscopic section of the small intestine wall.

Identify the mucosa, submucosa, muscular layer, and serosa.

Note the villi that extend into the lumen of the tube.

Study a single villus, using high-power magnification.

Note the core of connective tissue and the covering of simple columnar epithelium that contains some lightly stained goblet cells.

What is the function of the villi? 4.

Examine a microscopic section of the large intestine wall.

Note the lack of villi.

Also note the tubular mucous glands that open on the surface of the inner lining and the numerous lightly stained goblet cells.

Locate the four layers of the wall.

What is the function of the mucus secreted by these glands? 5.

Complete Part E of the laboratory report.

Critical Thinking Application How is the structure of the small intestine better adapted for absorption than the large intestine?

4 Figure 49.1

Label the major features of the oral cavity.Figure 49.2

Label the features associated with the major salivary glands.

5 Figure 49.3

Label the features of this cuspid tooth.

Figure 49.4

Label the features associated with the pharynx.

6 Figure 49.5

Label the major regions of the stomach and
Adam packet3 sp09
Spring 2009

1

BIO 204 ADAM Dissection - Packet 3

Name:
The Respiratory, Digestive, Urinary & Reproductive Organs

Refer to this packet while you complete the ADAM computer dissection.

Make sure you answer all questions asked and identify all structures listed.

Once you have identified a structure in one view you should be able to recognize it thereafter (even if its not in the list).

1.

Choose Dissectible Anatomy select the gender and the Medial view.

Then click open.

2.

Once on layer 0, scroll down to view the following.











< 0 ADAM anatomy medial view)

Answer the following questions

1.

List the pathway of air from the nose to the secondary bronchi:

Nose to
nasopharynx, then secondary bronchus.
Spring 2009

2 3.

Change to a lateral view and scroll to layer 164 and identify:

(ADAM- Dissectible Anatomy- layer 164, lateral view)

Answer the following questions 2.

The vagus nerve releases

(neurotransmitter) at its synapse with digestive

organs many teeth are

normally found in >









Scroll Down to view/identify

erve











(sphincter).
5.2 abdomen
Becomes Sigmoid (s-shaped) Colon.:

terminal end of sigmoid colon, no teniae coli, well-developed muscular wall, three transverse folds (rectal valves) that aid in defecation Anal Canal:

last part of large intestine, has longitudinal folds of mucosa (anal columns), that form anal

interceding spaces are anal sinuses which release mucus for lubrication.

Pectinate line separates visceral and external part of anus (superior to line, no pain because of visceral sensory innervation; inferior to this line, pain due to somatosensory innervation)

of the anal canal.They are commonly caused by irritation or build up of venous blood pressure.They can also be caused by a condition known as portal hypertension which can result from cirrhosis of the liver.

In a cirrhotic liver, blood flow is restricted due to fibrous scar tissue that forms during repair of hepatocytes (liver cells) that have been damaged by toxins or infection.

This causes a build up of pressure in the portal vein and its tributaries, leading to engorgement and distention.)

Anal Sphincters:

internal sphincter is smooth muscle (involuntary); external sphincter is skeletal muscle (conscious control).

Innervation and Blood Supply of Large Intestine: - First

of large intestine receives sympathetic innervation from superior mesenteric plexus and celiac plexus; parasympathetic innervation is from vagus- blood supply is from superior mesenteric vessels - Second

receives sympathetic innervation from inferior mesenteric plexuses; parasympathetic innervation is from pelvic splanchnic nerves (sacral outflow) - blood supply is from inferior mesenteric vessels; anal canal and rectum are supplied by branches of internal iliac vessels.
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all topicals that Sullivan has covered (so not insect bites/acne from Sobota) the packet starts c/ the diagram of the skin
My magnum opus "The experimental liquidvapor phase diagram of bulk nuclear matter" take a look!
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