Fastguide

Muscles 1 [ मांसपेशियों 1 ] THERE ARE THREE MAIN TYPES OF MUSCLE: skeletal muscle (also called voluntary muscle because it can be consciously controlled); smooth muscle (also called involuntary muscle because it is not under voluntary control); and the specialized muscle tissue of the heart Humans have more than 600 skeletal muscles, which differ in size and shape according to the jobs they do. [ मांसपेशियाँ के तीन मुख्य प्रकार हैं: कंकालीय मांसपेशी (जिसे स्वैच्छिक मांसपेशी भी कहा जाता है);चिकनी पेशी (जिसे अनैच्छिक पेशी भी कहा जाता है क्योंकि यह स्वैच्छिक नियंत्रण के अधीन नहीं है);और हृदय मनुष्यों के विशिष्ट मांसपेशियों के ऊतकों में 600 से अधिक कंकालीय मांसपेशियां होती हैं, जो अपने काम के अनुसार आकार और आकार में भिन्न होती हैं। ] Skeletal muscles are attached either directly or indirectly (via tendons) to bones, and work in opposing pairs (one muscle in the pair contracts while the other relaxes) to produce body movements as diverse as walking, threading a...

Eggs AN EGG IS A SINGLE CELL, produced by the female, with the capacity to develop into a new individual. Development may take place inside the mother's body as in most mammals) or outside, inwhich case the egg has a protective covering such as a shell. Egg yolk nourishes the growing young. Eggs developing inside the mother generally have little yolk, because the young are nourished from her body. Eggs developing outside may also have little yolk if they are produced by animals whose young go through a larval stage (such as a caterpillar) that feeds itself while developing into the adult form. The shelled eggs of birds and reptiles contain enough yolk to sustain the young until it hatches into a juvenile version of the adult.

why do we need leap years ? Since it takes Earth approximately 365 1/4 days to orbit the sun, an extra day's worth of time accumulates every four years. In a leap year, February receives an extra day to compensate for the difference between the astronomical year and the calendar year.  If no adjustment were made, the calendar and the seasons would drift apart by 24 days every 100 years. the plan of adding a day every four years was devised by the Egyptians . the Romans created a standard day February live February 29, in 46 b.c. adding one day per 4 years didn't perfectly correct the problem,  however, because Earth orbit  in 11 minutes and 14 seconds less than 365 1/4 days , A correction, established in 1582 , adds a leap day only to century year divisible by 400. thus 2000, was a leap year, but 2100 ,2200 and 2300 will not be. Hindi Translation  - हमें  लीप  वर्षों की आवश्यकता क्यों है? अधिवर्ष  (अंग्रेजी: लीप वर्ष ), हर चार  वर्ष ...

What is a comet?  These dirty snowballs, made of ice and dust, travel around the Sun in oval orbits. When they pass close to the Sun, the ice heats up forming long tails of dust and gas. धूमकेतु क्या है?  बर्फ और धूल से बने ये गंदे स्नोबॉल, अंडाकार कक्षाओं में सूर्य के चारों ओर घूमते हैं।  जब वे सूर्य के करीब से गुजरते हैं, तो बर्फ धूल और गैस की लंबी पूंछ बनाती है।

Star hunter /  स्टार शिकारी Studying the night sky has helped scientists discover many wonders in our Universe. Can you find the constellation of Orion the hunter in this starry scene? Start by looking for three bright stars in a line that make up his belt. Nearby, more stars form his body. स्टार शिकारी रात के आकाश का अध्ययन करने से वैज्ञानिकों को हमारे ब्रह्मांड के कई अजूबों को खोजने में मदद मिली है।  क्या आप इस तारों वाले दृश्य में ओरियन के नक्षत्र को खोज सकते हैं?  एक पंक्ति में तीन उज्ज्वल सितारों की तलाश करके शुरू करें जो उसकी बेल्ट बनाते हैं।  पास में, अधिक सितारे उसके शरीर का निर्माण करते हैं।