1/33
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced |
---|
No study sessions yet.
Classes of the phylum Annelida
Polychaeta (sandworms), Hirudinea (leeches) , Oligochaeta (earthworms).
Digestive system of the earthworm
Mouth (intakes nutrients) —> pharynx (ingest food and move along to esophagus) —> esophagus (transports food to crop) —> crop (temporary storage for food) —> gizzard (releases food & breaks up organic matter) —> long intestine (absorption of nutrients) —-> anus (exit for waste).
Respiratory system of earthworms
Diffusion of oxygen and carbon dioxide via moist skin. Secretion of mucus to keep moist.
Circulatory system of earthworms
Closed circulatory system, like humans. Ventral (belly side) & dorsal vessels. Aortic arches link ventral and dorsal vessels. They have 5 aortic arches that act like a heart.
Nerve cord
A solid strand of nerve fibers running along the length of the body, usually on the ventral (belly/front) side. It connects the brain to the body's organs and muscles, forming a central nervous system.
Setae
Small, stiff, bristle-like structures, often composed of chitin, that project from the body surface.
Parapodium
Fleshy protrusions on the outside of the body. Not present in earthworms or leeches.
Ventral
The front-side or belly-side of the animal body.
Dorsal
The back-side of an animal body.
Nephridium
excretory tubules in every segment except the first three segments. Removes waste from the body.
Brain
Fused ganglia. Control system of the worm.
Hermaphrodites
Cannot fertilize themselves.
Clitellum
A thick, saddle-like ring found in the epidermis (skin) of the worm, usually with a light-colored pigment. Helps with mating.
Benefits to the ecosystem of earthworms
Decomposers of leaves and organic matter, recycle nutrients, release natural fertilizers (waste), aerates the soil, and are good for fishing.
Vertebrae
Members of the subphylum Vertebrata within the phylum Chordata.
Endoskeleton
An internal skeleton made of bone or cartilage.
Adaptation for buoyancy
Stored gases or liquids help maintain vertical position in water.
Lateral line
A system of canals in the skin that allow fish to sense vibration in the water.
Streamlined body plan
Allows fish to move rapidly in water.
Jawless fishes
Hagfishes (class Myxini) and Lampreys (class Cephalaspidomorphi).
Hagfishes
Bottom-dwellers that feed on dead and dying fish.
Lampreys
Can be free-living or parasitic. Breed in freshwater. Fertilization occurs outside the body.
Parasitic Lamprey
They attach themselves to their host with disc-shaped mouths and feed on the blood and body fluids of other fishes.
Cartilaginous fishes
Sharks, stingrays, skates, ratfishes. They have skin covered with placoid scales.
Placoid scales
Reduce turbulence and increase swimming efficiency.
Chondrichthyes
Sharks, rays, skates, and ratfishes. They have skeletons made of cartilage.
Chordates
Animals with a notochord, dorsal hollow nerve cord, pharyngeal gill slits, post-anal tail.
Ampullae of Lorenzini
Sense organs that can detect weak electric fields.
Cartilage
A flexible lightweight material made of cells surrounded by tough fibers of protein.
Shark body shape
Torpedo shaped bodies.
Rays body shape
Diamond- or disk-shaped bodies.
Skates body shape
Triangular bodies.
Ratfishes
Small group of strange looking fish that have a flap of skin covering their gill slits. They have long tails and feed on crustaceans and mollusks.
Chemoreception
The ability to detect chemicals in the environment, includes the senses of smell and taste.