| A | B |
|---|
| hollow, muscular organ that pumps blood around the body | heart |
| parasites that live within or on a host, feeding on tissue, blood, or body fluids | parasitic symbiont |
| tiny bubblelike structures in lungs that increase surface area | alveoli |
| structures in land animals that allow for oxygen and carbon dioxide exchange | lungs |
| interior body space whose tissues carry out digestion & circulation | gastrovascular cavity |
| chamber of the heart that pumps blood away from the heart | ventricle |
| feathery structures in aquatic animals that exchange oxygen & carbon dioxide | gills |
| animals that rely on symbiosis for their nutritional needs | nutritional symbionts |
| animals that eat other animals | carnivores |
| food is broken down outside of cells, then absorbed | extracellular digestion |
| animals that eat plants or plant parts on land or in water | herbivores |
| animals that rely on mutualism for their nutritional needs | mutualistic symbionts |
| a pouchlike extension of the esophagus in which symbiotic bacteria digest cellulose | rumen |
| a system in which food is digested in a tube with 2 openings & moves in one direction | digestive tract |
| a circulatory system in which blood moves entirely within blood vessels throughout the body | closed system |
| animals that strain their food from water | filter feeders |
| partially digested plant material that is regurgitated, chewed again, & swallowed | cud |
| structure in arthropods that concentrates uric acid and adds it to digestive wastes | malpighian tubule |
| organs that separate wastes from excess water | kidneys |
| animals that feed on decaying bits of plant & animal material | detritivores |
| elimination of metabolic wastes | excretion |
| circulatory system in which blood is only partially contained within a system of vessels | open system |
| tube that brings oxygen rich air from mouth to lungs | trachea |
| movement of particles from high concentration to low | diffusion |
| tubelike excretory structures that filter body fluid | nephridia |
| pointed teeth for piercing, gripping, & tearing | canines |
| chamber of the heart receiving blood from the body | atrium |
| food is digested in specialized cells and passed by diffusion | intracellular digestion |
| chisel like teeth for cuttin, gnawing, and grooming | incisors |
| teeth towards the back of the jaw, modified for the food eaten | molars |
| a spongy cavity in the body of an organism | sinus |
| a sticky white substance, not water soluble, excreted by birds, reptiles and some arthropods | uric acid |
| excreted mostly by mammals and amphibians, water soluble | urea |
| product of the breakdown of proteins, highly toxic waste | ammonia |
| urea, uric acid, and ammonia are examples of this | nitrogenous wastes |
| openings in the body surface of insects allowing for air to enter and leave | spiracles |
