(20 14? Xiao fen plans to travel to Tibet with a group. The doctor advised her to cancel the trip because altitude sickness may endanger her life.

(1) Blood is mainly produced by the pumping action of the heart. Generally speaking, blood refers to the arterial blood pressure of systemic circulation, which can be measured at the brachial artery of the upper limb. When the heart contracts, the arterial blood pressure is the highest, which is called systolic blood pressure. When the heart relaxes, the arterial blood pressure is the lowest, which is called diastolic blood pressure. The arterial blood pressure of healthy adults is generally maintained at systolic blood pressure 12 ~ 18.7 kPa and diastolic blood pressure 8 ~ 12 kPa. Blood pressure often exceeds 18.7/ 12 kPa, which is called hypertension. Often lower than 12/6.7 kPa, called hypotension. The doctor measured Xiao fen's blood pressure as 2 1.3/ 13.3? KPa, so it should belong to hypertension.

(2) Respiratory movement refers to the rhythmic expansion and contraction of the chest, including inhalation and exhalation. The completion of respiratory movement is mainly related to the contraction and relaxation of respiratory muscles. After entering the plateau, the oxygen content in the air is less than that in the plain area. In this environment, the physiological reaction that can be produced is the acceleration of breathing frequency and heart rate. The process of air entering the lungs is lung ventilation, which is realized by breathing movement.

(3) (2) Gas exchange in alveoli, gas always diffuses from high concentration to low concentration until it reaches equilibrium; The content of oxygen in alveoli is more than that in blood, while the content of carbon dioxide is less than that in blood. So oxygen diffuses from alveoli to blood, and carbon dioxide diffuses from blood to alveoli; In this way, after the blood flows through the pulmonary capillaries, it changes from venous blood to arterial blood. The circulation of blood from the right ventricle into the pulmonary artery, through the pulmonary capillary network, and then back to the left atrium from the pulmonary vein is called pulmonary circulation.

(4) There is a red iron protein in red blood cells, called hemoglobin. Red blood cells are red because they contain hemoglobin. Characteristics of hemoglobin: it is easy to combine with oxygen in places with high oxygen content; In places with low oxygen content, it is easy to separate from oxygen. So red blood cells have the function of transporting oxygen because of hemoglobin, and oxygen is carried by hemoglobin in red blood cells.

(5) During altitude sickness, the heart rate is accelerated, the pumping capacity of the left ventricle is increased, and the vascular burden is aggravated. Because of intracranial hemorrhage, Xiao fen may be life-threatening.

(6) After gas exchange in tissue cells, blood changes from arterial blood to venous blood. At the same time, nutrients in blood enter tissues and cells to breathe, and oxygen participates in the oxidative decomposition of organic matter in cells, releasing energy stored in organic matter for human life activities.

So the answer is: (1) hypertension;

(2) breathing;

(3) Gas exchange in alveoli; Arteries; b；

(4) red blood cells;

(5) left ventricle;

(6) breathing; Energy.