Digestive

internal stability of the body

digestive system provides energy

needs blood and O2 to function

make energy by making their own food using sunshine

consume other organisms to obtain energy

1) filter feeding 2) substrate feeding 3) fluid feeding 4) bulk feeding

use structure similar to a filter basket to gather food suspended in water ex: sponges, tube worms, clams, barnacles

live in their food source and eat through it ex: caterpillars, earthworms

suck or lick nutrient rich fluid from plants or animals ex: mosquitoes, ticks, spiders, bees

ingest large pieces of food ex: humans and all other mammals

Herbivores and omnivores have longer tracts than carnivores

break down foods into their molecules so they can be used by the body

so they can pass through the plasma membranes of each cell

circulatory system

Ingestion → Digestion → absorbtion → Egestion

Bringing Nutrients into the body usually happens in the mouth

Breaks down food into smaller pieces

mechanical and chemical

physically break down food decreases surface area chops and grinds food

Enzymes break down food to a molecular level chemical bonds in food particles are separated

nutrients are absorbed mainly in the small intestine products are moved to circulatory system to be distributed to the rest of the body

Food molecules are removed from body it is usually the food that the body is unable to digest

long, open tube (usually one-way)

specialized regions, with different organs along the tube processing food in different ways.