SBI3U Unit 4A Test Review

Vocabulary flashcards for the SBI3U Unit 4A test review, focusing on animal phyla, digestion, and the human digestive system.

Porifera

Animal phylum with asymmetrical bodies, no true tissues or organs, and a skeleton made of collagen and spicules; includes sponges.

Cnidaria

Animal phylum with free-swimming members, harpoon-like structures, and a simple nerve net; includes jellyfish and corals.

Platyhelminthes

Animal phylum with bilaterally symmetrical bodies, a head and tail, but no circulatory system or hard skeleton; includes planarians and tapeworms.

Annelida

Animal phylum with segmented bodies, muscles, and bristle-like structures; includes earthworms and leeches.

Arthropoda

Animal phylum with a hard exoskeleton, jointed appendages, and segmented bodies that molt to grow; includes crabs, spiders, and scorpions.

Mollusca

Animal phylum with a radula (feeding organ), a muscular foot, gills or lungs, and often a calcium shell; includes octopuses, squids, and oysters.

Echinodermata

Animal phylum with radial symmetry (5-point), a hard, spiny covering on the skin, and the ability to regenerate; includes starfish and sand dollars.

Chordata

Animal phylum characterized by a notochord; includes fish, snakes, and humans.

Amylase

Enzyme that breaks down starch into maltose in the mouth and small intestine.

Pepsin

Enzyme that breaks down proteins into peptides in the stomach.

Lipase

Enzyme that breaks down lipids into fatty acids in the small intestine.

Intracellular Digestion

Digestion that occurs when each cell digests and egests food individually.

Extracellular Digestion

Digestion that occurs inside a digestive tract or cavity.

Filter Feeding

Type of feeding where food particles are strained out of water; example: Humpback whale.

Substrate Feeding

Type of feeding where organisms live on/in what they eat; example: parasites.

Fluid Feeding

Type of feeding where organisms feed off of liquids like blood and nectar; example: mosquitoes.

Bulk Feeding

Type of feeding where organisms ingest large amounts of food; example: humans.

Physical Digestion

Breaks food into smaller pieces

Chemical Digestion

Enzymes break down the food into molecules

Endoscopy

Camera tube which examines digestion tract to see any issues such as tumor