Pre-AP Vertebrates

	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