Pig Dissection Anatomy: External Anatomy (1)

Pinna

The external ear flap that collects sound waves and directs them into the ear canal to help with hearing.

Nares

The nostrils that allow air to enter and leave the respiratory system and contain receptors for smell.

Trunk

The main body section that contains most major organs, including those of the digestive, respiratory, and circulatory systems.

Anus

The opening at the end of the digestive tract where feces leave the body

Penis

The male reproductive organ used to deliver sperm during reproduction and to remove urine from the body.

Vaginal opening

The external opening of the female reproductive system through which reproductive fluids and offspring pass.

Posterior

Anatomical term meaning toward the tail or rear end of the pig.

Dorsal

Refers to the back side or upper surface of the pig.

Philtrum

The groove located between the nose and upper lip that forms during embryonic development.

Mammary glands

Specialized glands that produce milk for feeding offspring after birth.

Thorax

The chest cavity that contains vital organs such as the heart and lungs.

Umbilical cord

Structure connecting the fetus to the placenta, supplying oxygen and nutrients while removing wastes.

Scrotum

External sac that protects and regulates the temperature of the testes.

Age of pig

Often estimated using body size, weight, and tooth development.

Anterior

Anatomical term meaning toward the head or front of the pig.

Umbilical artery

Blood vessel that carries deoxygenated blood and wastes from the fetus to the placenta.

Vibrissae

Specialized, highly sensitive tactile hairs found on most mammals, used as sensory organs for navigation, hunting, and spatial awareness

- Hairs on snout and under chin

Nipples

Openings connected to mammary glands through which milk is released

Abdomen

Body cavity located below the thorax that contains digestive, urinary, and reproductive organs.

Tongue with taste buds

Muscular organ that helps manipulate food, assists swallowing, and contains taste receptors

Urethral opening

External opening where urine exits the body.

Gender of pig

Determined by observing external reproductive structures.

Ventral

Refers to the underside or belly side of the pig.

Umbilical vein

Blood vessel that carries oxygen-rich blood and nutrients from the placenta to the fetus.