The Human Body- Staying Alive (OCR)

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.