Raj Mishra

  Natural In Adolescence, Boys And Girls Take Care Of Their Face And Look Frequently In Mirror. They Also Feel Worried Of Their Pimples And Acne. Sometimes These Pimples Lead To Infection  The Secretions Of Sweat Glands And Sebaceous Glands In Adolescents Are Very Active. Many Adolesent Boys And Girls Get Pimples On The Face, Because Of Increased Activity Of These Glands In The Skin, Often The Pimples Become Infected To, Owing To Extra Secretions, Sometimes A Distinctive Odour Is Also Produced From Their Bodies L. Do Not Squeeze The Pimples Or It Might Hurt And Result Into Dark Sports On Your Skin  Important Points 1:- Adolescense Is The Period Of Reproductive Maturity Which Lies Usually Between The Eyes Ages Of 10 To 19 Years  2:- Voice Of Boys Becomes Hoarse As Chords Of Voice Box Get Loosened And Thickened During Adolescence QNA 1: How Is Adolescence Different From Childhood?  2:- Why Acna And Pimples Are Common In Adolescents

 Our Eye Contains Eye Lids, Eye Lashes, Eyebrows And Lacrimal Glands. A Thin Layer, Called Conjuctiva Covers The Front Portion Of The Eye. The Eye Ball Is Located In The Eye Socket. Only 1/6 Portion Of The Eye Ball Is Visible To Us.  Eye Has Three Main Layers. They Are Sclerotic Layer On Sclera, Choroid Layer And Retina. The Outer Most Thick, Tough, Fibres, Non-Elastic And White Coloured Layer Is Sclera. The Sclera Bulges And Forms Cornea. The End Of Sclera Connects To The Optic Nerve. The Second Layer Is Choriod Layer. This Layer Is Black In Colour And Contains A Lit Of Blood Vessels. It Encloses The Eye Except The Part Pupil. The Part Formed By The Choroid Layer Around The Pupil Is Iris. Radial And Circular MusclesAre Present In The Iris. Biconvex Lens Is Present Immediately Behind The Pupil Which Is Attached To The Ciliary Muscles And Suspensory Ligaments  The Lens Divides The Inner Eye Ball As Aqueous Chamber And Vitreous Chamber Aqueous Chamber Is Filled With Water Like Fluid Wher

Usually when cells are seen under the microscope, the image appears are flat and two- dimensional. It seems that all the organelles in the cell are situated in one plane

All the organelles shown in the typical plant or animal cell will not exist in every cell. For example, chloroplasts are always shown in the typical plant cell, yet all the plant cells do not have chloroplasts. They are mostly found in the cells of green leaves, tender stems etc. The organelles that feature in most of the cells are included in this model. The typical cell provides a way to study cells. Once we arrive at such a model, we can compare any cell animal.  1:- What common features do you see in both the cells  2:- Which cell organelles are found exclusively in plant cell?  3:- Compare the parts of plant and animal cells, note down the differences Let us study the different parts of plant and animal cells 

The Earth Rotates Or Goes around just like a top spins, What does it go around? It actually rotates around an imaginary line which joins the North pole and the South pole. This line is called the axis of the earth's rotation. All parts of the earth go around this line once a day. In other words,the earth takes about 24 hours to rotate or go around its own axis. It moves from the west to the east if a globe is facing you it rotates from your left to the right side. You can see that the western portion moves towards the east. Take a globe and focus a torch light on it from a small distance. The torch illuminates one half of the globe. If you rotate the globe in front of the light, then also only half the circumference of the globe is illuminated 

You Have Already Studied impact of the spherical shape of the earth and how this causes distribution of heat over the earth's surface differently , how the region around the equator becomes warmer than those near the poles 

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