FETAL PIG DESIGN: ANATOMY

There are two basic kinds of “cutting.” Sharp dissection – cutting with a scalpel or scissors. What are the advantages and disadvantages? When should we use sharp dissection? Blunt dissection – separating tissues with a blunt probe, scalpel handle, or fingers. What are the advantages and disadvantages? When should we use blunt dissection?

There are two anatomical approaches to dissection Regional anatomy – dissection to study the “regions” of the body – head and neck, thorax, abdominal cavity, legs, etc. Systemic anatomy – dissection to study the body system: musculoskeletal, digestive, respiratory, etc. We will use a hybrid combination of approaches.

cheek Find: Masseter Submandibular salivary gland M SG

Cheek

Some superficial muscles

More superficial muscles

Neck and thorax Find: Trachea and larynx Thyroid gland Thymus Heart: left and right auricles Pulmonary artery trunk Anterior vena cava Common carotid artery and vagus nerve Jugular vein

Neck and thorax

Neck and thoracic cavity Find: Trachea Thyroid gland L and R auricles of heart Pulmonary trunk Anterior vena cava Common carotid and vagus nerve

Neck and thoracic cavity

Thoracic cavity Find: Esophagus Lung Diaphragm Aorta Intercostal a. and v.

Thoracic cavity

Upper abdominal region

Find: Body and pylorus of stomach Greater and lesser curvatures of stomach Gall bladder Cystic duct Common bile duct

Abdominal cavity Find: Liver Spleen Small intestines Spiral colon Rectum Mesentery Kidney Ureter Uterus (horn) Ovary

Abdominal cavity

Find: Liver Umbilical vein Spleen Pancreas Small intestine Mesentery Spiral colon Rectum Kidney Ureter

Abdominal cavity

Abdominal viscera Find: Liver Stomach Greater omentum Spleen Small intestines Mesentery Mesenteric lymph nodes Spiral colon

Abdominal cavity: male pig Find: Liver and spleen Stomach Pancreas Small intestines and mesentery Spiral colon Kidney and ureter Vas deferens

Abdominal cavity Male pig

Abdominal viscera

Female pig (colon retracted) Find: Small intestine Cecum Spiral colon Kidney and ureters Horns of uterus Fallopian tube Ovaries

Think… Female pig (colon retracted)

Female viscera Find: Body of uterus Uterine horns Fallopian tubes Ovaries Bladder Umbilical artery

Female viscera

Think… The human uterus has a body but no horns. Why does it make biological sense that pigs, dogs, and cats have uteri with two well-developed horns?

Male pig Find: Kidney and ureter Rectum Urinary bladder Testis Epididymis Vas deferens

Male pig

We’re done!