Ncert Exercises & Solutions

21. Given below are the abnormal conditions related to blood circulation. Name the disorders

(a) Acute chest pain due to failure of O₂ supply to heart muscles

(b) Increased systolic pressure.

(a) Angina also called as ‘angina pectoris’. It a symptom of acute chest pain that appears when there is no enough oxygen is reaching to the heart muscle. Angina can occur in men and women of any age butitis more common among the middle aged and elder people. It occurs due to condition that affect the blood flow (hypertension etc.)

(b) High Blood Pressure (hypertension) is the term for blood pressure thatis higher than normal (120/80). In this measurement 420 mm Hg is the systolic, or pumping pressure and 80 mm Hg is the diastolic or resting pressure.

Increased systolic pressure, i.e., 140/80 or 150/80, shows hypertension. High blood pressure leads to heart diseases and also affects vital body organs like brain and kidney.

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