Lab 11 Human/Cat Digestive System Gross/Microscopic Anatomy Biology 102 Lab 11 Human/Cat Digestive System Gross/Microscopic Anatomy 100 min, 52 slides

Objectives for Today Identify the structures of the digestive system that are listed in your Laboratory Guide, given either a model or photograph of a model Be able to sketch the hepatobiliary system (Liver, Bile ducts, and Gall bladder) and surrounding organs, labeling all relevant structures. (You will hand your sketch in as your lab report.)

Major Organs of Digestive System Figure from: Saladin, Anatomy & Physiology, McGraw Hill, 2007 Organs can be divided into the: Digestive tract (alimentary canal); tube extending from mouth to anus (about 30 ft.) Accessory organs; teeth, tongue, salivary glands, liver, gallbladder, and pancreas

The Greater and Lesser Omenta * * * * * * * * * Figure from: Saladin, Anatomy & Physiology, McGraw Hill, 2007

Palate and Pharynx roof of oral cavity * * (adenoids) Figure from: Hole’s Human A&P, 12th edition, 2010 (adenoids) * Muscles of the soft palate include: 1. Tensor Palati, 2. Levator Palati, 3. Palatoglossus, 4. Palatopharyngeus, and the 5. Superior Constrictor *

Salivary Glands * Figure from: Saladin, Anatomy & Physiology, McGraw Hill, 2007 * * Figure from: Hole’s Human A&P, 12th edition, 2010

Esophagus * * Esophagus lies behind the trachea Esophagus is about 25 cm long. Straight course through the mediastinum. Solid foods pass from the oropharynx to the stomach in about 8 sec.; fluids in about 1-2 sec. * Esophagus lies behind the trachea Figure from: Hole’s Human A&P, 12th edition, 2010

Position of Spleen *

Stomach * * * * * * * Pyloric sphincter = pylorus Cardiac sphincter Greater curvature * Range of stomach volume is about 50 ml (empty) to about 4L (very distended). * Pyloric antrum * Pyloric sphincter = pylorus Figure from: Hole’s Human A&P, 12th edition, 2010

Simple columnar epthelium Gastric pits 09_H3156_labeled.jpg Gastric glands in lamina propria Parietal cells

Pancreas * * * * * * * * * * Accessory duct - Main duct Figure from: Hole’s Human A&P, 12th edition, 2010 * * * * * * Accessory duct * * - Main duct * *

Acinar tissue Ducts Pancreatic islets 42_H2229_labeled.jpg

Acinar tissue Duct 43_H3004a_labeled.jpg Pancreatic islet

Liver (Hepato-) * * * * * * * Figure from: Martini, Anatomy & Physiology, Pearson Education, 2004

Liver lobule Liver sinusoids 49_H2228_labeled.jpg Central vein

Hepatocytes Sinusoids 52_H2150z_labeled.jpg Central vein

Hepatobiliary System You will be sketching this today for your lab report. Figure from: Hole’s Human A&P, 12th edition, 2010

Three Parts of Small Intestine * * * * * * * Figure from: Hole’s Human A&P, 12th edition, 2010

Villi Muscularis mucosae Mucosa Submucosa Muscularis externa 18_H2227_labeled.jpg Intestinal crypts Duodenal glands Serosa

Simple columnar epithelium Submucosa Villi Muscularis mucosae Intestinal crypts Circular muscle of muscularis externa 15_H3005_labeled.jpg Longitudinal muscle of muscularis externa Duodenal glands

Myenteric nerve plexus Longitudinal muscle Circular muscle Serosa Myenteric nerve plexus 17_H3020b_labeled.jpg

Circular muscle Myenteric nerve plexus 19_H2147z_labeled.jpg Longitudinal muscle

Nuclei Simple columnar epithelium Microvilli 16_H3006_labeled.jpg Villus Lamina propria of villus

Nuclei Goblet cell Simple columnar epithelium Basement membrane 12_H2045z_labeled.jpg

Muscularis externa Plica circulares Submucosa Peyer’s patches Submucosa of plica circulares 24_H3133_labeled.jpg

Large Intestine * * * * * * * * *

Submucosa Mucosa Circular muscle of muscularis externa 27_H3168_labeled.jpg Teniae coli Serosa

Intestinal crypts Goblet cells Simple columnar epithelium 29_H3170_labeled.jpg Muscularis mucosae Submucosa

03_C0018b_labeled.jpg Parotid gland Submandibular gland

Esophagus 04_C0019_labeled.jpg

Gallbladder Liver Stomach Spleen Greater omentum Urinary bladder Respiratory diaphragm Gallbladder Liver Stomach Spleen Greater omentum 05_C0022_labeled.jpg Urinary bladder Urethra

Liver Lesser omentum Stomach Spleen Greater omentum Small intestine 06_C0026_labeled.jpg Small intestine Adipose tissue Urinary bladder

Heart Falciform ligament Diaphragm Left medial lobe Gallbladder Right medial lobe Left lateral lobe Right lateral lobe Spleen 07_C0020_labeled.jpg Caudate lobe Stomach

Liver Bile duct Gallbladder Stomach Cystic duct Duodenum Pancreas 08_C2023a_labeled.jpg Hepatic ducts Pancreas

Pancreas Duodenum Cecum Small intestine 09_C0025_labeled.jpg

Greater omentum Pancreas Cecum Kidney Small intestine Large intestine Mesentery Urinary bladder 10_C0024_labeled.jpg Uterus

Gallbladder Falciform ligament Right lobes of liver Left lobes of liver Duodenum Lesser omentum Stomach Pancreas Ileocecal junction Ascending colon Cecum Spleen Jejunum Greater omentum Mesentery Small intestine 11_C2017a_labeled.jpg Ileum Descending colon Urinary bladder Urethra

Spleen Stomach Pancreas Intestines Liver Respiratory diaphragm 12_C0056a_labeled.jpg Kidney

Diaphragm Liver Pancreas Adrenal gland Stomach Left kidney Small Intestine 13_C0013a_labeled.jpg

Rugae 14_C0028_labeled.jpg

Lymph nodes Pancreas Mesentery 15_C0027_labeled.jpg Small intestine

Ileum Colon Ileocecal valve Spleen Cecum Small intestine 16_C2024_labeled.jpg Small intestine

What You Should Do in Lab Today… Locate the structures listed in your Laboratory Guide using Individual models of organs Torso models Cats Sketch the hepatobiliary system as outlined on the sheet handed out today and hand that in before leaving today. Look at the Respiratory System Structures in the cat if you haven’t done so already.

For next lab… Digestive System Enzyme experiment Please read the protocol for this experiment online. We will be examining the factors influencing the digestive enzymes we discussed in lecture