Digestion can not All animals are heterotrophs – they can not make their own food Digestion –...
-
Upload
julian-nelson -
Category
Documents
-
view
216 -
download
1
Transcript of Digestion can not All animals are heterotrophs – they can not make their own food Digestion –...
DigestionDigestion
• All animals are heterotrophs – they can not can not make their own food
• Digestion – process of breaking down food into smaller molecules that the organism can use
• Absorption – method by which cells take up the digested nutrient molecules
Types of Digestive Tracts
Types of Digestive Tracts
Filter Feeder
Filter Feeder: animals that eat by separating food particles from water
Types of Digestive Tracts
Filter FeederGastrovascular
Cavity
Gastrovascular Cavity: 1 opening where food goes in and wastes go out
Types of Digestive Tracts
Filter FeederGastrovascular
Cavity
Complete Digestive Tract
Complete Digestive Tract: 2 openings where food goes in (mouth) and wastes go out (anus)
•Porifera are filter feeders •They eat bacteria•Cells called ameobacytes carry the nutrients throughout the whole sponge
Porifera - Porifera - SpongesSponges
PLATYHELMINTHES - PLATYHELMINTHES - FLATWORMSFLATWORMS
Flatworms eat tiny crustaceans, protists, or other flatworms depending on their habitat.
ArthropodsArthropods• Arthropods exhibit every type of feeding mode. They include
carnivores, herbivores, detritus feeders, filter feeders, and parasites, and there are specializations within these major categories.
Echinodermata – starfish, etcStarfish digestion is carried out in two stomachs:
the cardiac stomach and the pyloric stomach.
The cardiac stomach, which is a sack like stomach located at the center of the body may be everted—pushed out of the organism's body and used to eat and digest food.
The cardiac stomach is then brought back inside the body, and the partially digested food is moved to the pyloric stomach. Further digestion occurs in the intestine and waste is either excreted through the anus.
http://www.youtube.com/watch?v=rE8l-KFQlhY&feature=related
Starfish eat clams, muscles, oysters
Chordata-Aves
• What do birds eat?
Human Human DigestionDigestion
• What do humans eat?