bio 1020 unit 6 vocab

Alveoli: tiny thin-walled air sacs at the ends of bronchioles in the lungs, surrounded by capillaries

Bronchi: tubes branching from the trachea that carry air into each lung

Bronchioles: tubes from the bronchi that lead to clusters of alveoli

Diaphragm: large muscle at the floor of the chest cavity; contraction of this muscle expands the chest cavity and draws air into the lungs

Ectotherm: organism whose body temperature is determined primarily by the temperature of their environment

Embryo: developing organism; "baby" plant or animal

Endosperm: food source for developing plant embryo

Endotherm: organism whose body temperature is maintained independent of environmental temperature, usually at a metabolically optimal level

Epiglottis: flap at top of trachea that prevents food from entering or blocking the pathway of air to the lungs

Metabolism: the collection of chemical reactions that occur in organisms

Spiracle: opening in insect body wall through which air enters tracheae

thermal strategy: metabolic patterns of organisms

Trachea: air tube leading from back of mouth down into chest cavity; the "windpipe"

Tracheae: tiny tubes in insect body that deliver oxygen directly to metabolizing cells and tissues