Terms : Hide Images
| animal that has a vertebral column or backbone | ||
| strong connective tissue that supports the body and is softer and more fllexible than bone | ||
| sensitive receptor system that enable the fish to detect gentle currents and vibrations in the water | ||
| internal gas-filled organ in many bony fishes that adjusts their buoyancy | ||
| moveable transparent membrane in amphibians located inside the regular eyelid; protects the surface of the eye from damage under water and keeps it moist on land | ||
| eardrum of amphibians inside the skull; vibrates in response to sound, allowing hearing | ||
| animal that relies on interactions with the environment to help it control body temperature | ||
| structure made mostly of protein that develops from a pit in a bird's skin | ||
| animal that generates its own body heat and controls its body temperature from within | ||
| in earthworms, part of the digestive system in which food can be stored; in birds, structure at the lower end of the esophagus in which food is stored and moistened | ||
| in earthworms, part of the digestive system in which food is ground into smaller pieces; in birds, a muscular organ that helps in the mechanical breakdown of food | ||
| one of several sacs attached to a bird's lungs into which air moves when a bird inhales; allows for the one-way flow of air through the respiratory system | ||
| gland in mammals that produces milk to nourish the young | ||
| large, flat muscle at the bottom of the chest cavity that helps with breathing | ||
| egg-laying mammal | ||
| mammal that bears live young that complete their development in an external pouch | ||
| organ in plancental mammals through which mutrients, oxygen, carbon dioxide, and wastes are exchanged between embryo and mother | ||
| term used to refer to a long tail that can grasp branches | ||
| small, nocturnal primate that has large eyes for seeing in the dark | ||
| thumb that enables grasping objects and using tools |
