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How the lungs work
Cut the bottom off a large bottle. Fit a cork to the neck with a Y tube in it. On every of the lower limbs of the Y tie a rubber balloon or a number of small bladder.
Tie a sheet of brown paper or sheet rubber round the bottom of the jar, with a piece of String knotted by a hole and sealed with wax. Pulling this string lowers the diaphragm and air enters the neck of the Y piece causing the balloons to dilate.
Pressing the diaphragm upwards has the opposite effect.
How is the parathyroid hormone secretion regulated? It is simple. An increase in parathyroid hormone causes an increase in calcium absorption from the intestine and renal tubul
Role of Antibody Mediated Immune System The AMlS defends the body against free viruses, bacteria with polysaccharide capsules and toxins that enter the body fluids (blood and l
a ray of light falls on a transparent slab of refractive index u.if the reflected and refracted rays are mutually perpendicular to each other,find the angle of incidence.
lable the direction of increasing frequency and the direction of increasing wavelength on the em.
Assembling First Aid Box : Your Counsellor will show you the contents of the first aid box available at the Study Centre. You observe the contents. As part of this activity, yo
In a unicellular organism, the interior region of the organism is no longer in contact with the external environment. Thus simple processes of diffusion, phagocytosis, exocyt
Amino acids are the building blocks of proteins. All proteins consist of a sequence of amino acids, which are compounds containing an amino group (-BIB) and a carhoxyl gro
What are 6 types of neuroglial cells?
Explain the Closed System - Thermodynamic The system that can exchange energy with their surrounding but not the mass is known as the Closed System. So, the quantity of matter
Explain Folic acid Folic acid is a water soluble B-vitamin that helps build healthy cells. Along with iron, this vitamin is crucial during pregnancy as you may already know
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