Ch.15 Digestive and Nutrition Systems

Describe the primary functions of the digestive system.

Break down foods into useable nutrients for absorption into the blood stream.

Identify all major digestive organs.

Oral cavity, pharynx, esophagus, stomach, small intestine, large intestine, rectum, anus.

What organ is this?

oral cavity (proper)

What organ is this?

Pharynx

What organ is this?

esophagus

What organ is this?

stomach

What organ is this

small intestine

what organ is this?

transverse colon (part of large intestine)

What organ is this?

ascending colon (part of large intestine)

what organ is this

descending colon (part of large intestine)

what organ is this

rectum

what organ is this

anus (anal canal)

what is mechanical and chemical digestion

mechanical is the breakdown of food into smaller particles without altering their chemical composition.

Chemical digestion is the process of breaking down large molecules into simple chemical, allowing them to be absorbed.

briefly describe the mouth’s role in digestion.

the mechanical digestion of food with mastification; begins chemical digestion of carbohydrates