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

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

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 cavityMale 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!