Bio unit 1 module 2

Pathway of Energy

Sun(solar energy) . Plant Sugar (chemical energy) > Digestion (chemical energy) > cells (atp)

Digestive system functions

1. Breakdown incoming nutrients to be transported to cells of body

2. Supply cells with water

3. Remove undigested waste material

2 forms of digestion

Mechanical and Chemical

Mechanical digestion

Physically breaking food down to increase its surface area

Stomach and Mouth involved

Chemical digestion

Break down nutrient molecules using enzymes to harvest energy

Organs involved is small intestine

salivary glands

lubricates food and provides enzymes

mouth

breaks up food by mechanical and chem digestion

esophagus

transports food to stomach

pharynx

the cavity behind the mouth that connects to the esophagus and trachea, playing a role in swallowing.

liver

produces bile and provides enzymes

gallbladder

stores bile

stomach

mechanical mixing of food

pancreas

produces digestive enzymes, regulates blood sugar

large intestine

absorbs water and electrolytes, forming waste

small intestine

major organ for digestion and absorption