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7.21 Mrs Jensen
Respiration and Excretion
16
Science
7th Grade
09/28/2011

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Term
pharynx

7.21
Definition
a tubelike passageway for both food and air through which inhaled air passes after it is warmed and moistened in the nasal cavity
Term
larynx

7.21
Definition
the airway to which the vocal chords are attached
Term
trachea

7.21
Definition
the cartilage-reinforced tube that remains open and connects with the bronchi
Term
bronchi

7.21
Definition
the two short branches at the lower end of the trachea that carry air into the lungs
Term
alveoli

7.21
Definition
located in the lungs, the tiny, thin-walled sacs arranged in grape-like clusters at the end of each bronchiole
Term
diaphragm

7.21
Definition
the muscle beneath the lungs that contracts and relaxes with breathing and that helps move air in and out of the body
Term
chronic bronchitis

7.21
Definition
a long-lasting respiratory disease in which the bronchial tubes are irritated and too much mucus is produced
Term
emphysema

7.21
Definition
a respiratory disease in which the alveoli in the lungs lose their ability to expand and contract
Term
asthma

7.21
Definition
a lung disorder in there may be shortness of breath, wheezing, or coughing and that may occur as an allergic reaction
Term
urinary system

7.21
Definition
the system of excretory organs that rids the blood of wastes produced by the metabolism of nutrients, controls blood volume by removing excess water produced by body cells, and balances concentrations of certain salts and water
Term
kidney

7.21
Definition
a bean-shaped organ of the urinary system that is made up of about one million nephrons and that filters blood to produce waste liquid
Term
nephron

7.21
Definition
a tiny filtering unit of the kidney
Term
urine

7.21
Definition
the waste liquid of the urinary system, containing excess water, salts, and other wastes
Term
ureter

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Definition
the tube that leads from the kidney to the bladder
Term
bladder

7.21
Definition
the muscular, elastic organ that holds urine until it leaves the body
Term
urethra

7.21
Definition
the tube that carries urine from the bladder to the outside of the body
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