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state the function of respiratory system?
Supplies oxygen to the blood and removes carbon dioxide.
what is a pharynx?
A Passageway for air and food.
what is a larynx (voice box)?
Directs air to the trachea; houses vocal cords
what is trachea?
Airway to lungs, reinforced with cartilage rings
describe inhalation?
Diaphragm and intercostal muscles expand the thoracic cavity
what is alveoli?
Site of gas exchange with capillaries
describe exhalation?
Diaphragm relaxes, expelling air from lungs
what is asthama?
Inflammation/narrowing of airways.
what is Pneumonia?
Infection causing inflamed air sacs.
what is the function of circulatory system?
Transports oxygen, nutrients, hormones, and wastes.
describe the structure of heart?
Four chambers (atria, ventricles) pump blood; valves ensure one-way flow.
what are arteries?
Blood vessels that carry oxygenated blood away from the heart
what are veins?
Return deoxygenated blood to the heart.
what are capillaries?
Sites of exchange between blood and tissues
what is the function of RBCs
Transport oxygen.
what is the function of WBCs?
Fight infections
state the function of small intestine?
Major digestion/absorption; aided by bile and pancreatic enzymes.
what do platelets do?
Aid in clotting.
what is the function of plasma?
Carries cells, nutrients, and waste
what happens in coronary heart disease?
Blocked coronary arteries
what is meant by heart failure?
Heart’s inability to pump efficiently.
describe the function of digestive system?
Breaks down food into absorbable nutrients.
what is esophagus?
Food passage to stomach.
what happens in gallstones?
Bile imbalances leading to stones.
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