Digestive System

Formative 1

Homeostasis

The ability to maintain balance, and stability inside and outside the body.

Digestive System Function

To break down food into molecules the body can use for growth, repair, and energy.

Chemical Digestion

Chemically breaking down food into molecules/nutrients that can actually be used by the body.

Mechanical Digestion

Physically breaking down food into smaller particles.

Mouth Function

It is the first organ the food passes through. It completes chemical digestion through saliva and mechanical digestion through teeth.

Pharnyx

Not a digestive organ. Common passageway for breathing and swallowing.

Esophagus

It is a muscular food tube. It is where peristalsis occurs (contractions that move food along). It uses minimal mechanical digestion.

Stomach

Very muscular. It has pepsin to break down dietary proteins. It also has Hydrochloric acid to break down food. It has both chemical and mechanical digestion involved.

Small Intestine

It is where nutrients are primarily absorbed. Includes chemical digestion. It is entwined with blood vessels, and also uses villi to absorb nutrients- hair like things inside small intestine.

Large intestine

Absorbs WATER, MINERALS, ans nutrients here. Indigestible material is eliminated here. E.-coli, bacteria is found in large intestine. It helps break down complex materials, only good when in large intestine.

Liver

It produces bile. It filters materials taken in by the body, and is necessary for survival.

Gall Bladder

Stores and releases bile. It is not necessary for survival.

Pancreas

It has weird ridges/ruffles. Secretes bicarbonate (neutralize acid). It also secretes insulin (to regulate blood sugar levels). If something wrong with Pancreas (diabetes). Needed for survival, but functions not needed.

Chyme

Made up of digested food- from the stomach, water, hydrochloride acid, and other digestive enzymes. It acts as an intermediate form of food. Once passed down into small intestine, it mixes with bile to further digest.

Digestion involves…

Breaking down food, AND absorbing the nutrients.