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Subject: Physical Education
Class: IX
I. Fill in the blanks:-
1. The diameter of alveoli is
in diameter
2. The
is a sheet of muscular tissue
3. The maximum volume of air that can be inhaled & exhaled during breathing is called
4. The left &right chambers of heart are separated by
5. The normal blood pressure is
6. Life span of red blood cells is
Answers
Answer:
Explanation:
1: 200 micrometers
2: diaphragm
3: Vital Capacity
4: Inter Auricular Septum separates the auricles
Inter Ventricular Septum separates the ventricles
5: 120/80mmHg
6: 120 days
Answer:
1 ) Each alveolus is wrapped in a fine mesh of capillaries covering about 70% of its area. An adult alveolus has an average diameter of 200 micrometres, with an increase in diameter during inhalation
2 ) Where is muscle tissue located?
Smooth muscle fibers are located in walls of hollow visceral organs, except the heart, appear spindle-shaped, and are also under involuntary control. Skeletal muscle fibers occur in muscles which are attached to the skeleton. They are striated in appearance and are under voluntary control.
3 ) The vital capacity (VC) measures the maximum amount of air that can be inhaled or exhaled during a respiratory cycle. It is the sum of the expiratory reserve volume, tidal volume, and inspiratory reserve volume. The inspiratory capacity (IC) is the amount of air that can be inhaled after the end of a normal expiration.
4 ) Your heart has four separate chambers that pump blood. The chambers are called the right atrium, right ventricle, left atrium, and left ventricle. The right and left sides of the heart are separated by a muscular wall that prevents blood without oxygen from mixing with blood that has oxygen.
5 ) normal blood pressure level is less than 120/80 mmHg. No matter your age, you can take steps each day to keep your blood pressure in a healthy range.
6 ) Human red blood cells (RBC), after differentiating from erythroblasts in the bone marrow, are released into the blood and survive in the circulation for approximately 115 days. In humans and some other species, RBC normally survive in a nonrandom manner.