How to draw human baby in womb


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How to draw Mitochondria Mitochondria  is cell organelle which generates power required for cell and hence called `Power house of the cell". They are sac like structures present in the cytoplasm of the cells. They may be of various shapes like thread, spherical or club. Mitochondria have two compartments an inner compartment and an outer compartment.  The viscous substance in the inner compartment is called Matrix. The matrix is surrounded by a membrane called Inner membrane. The inner membrane is thrown into several folds called Cristae. Now let`s draw mitochondria.   Step 1: Draw a rough sausage shape with free hand in faint curve. Do not stop the curve in the middle, continue until you meet the starting point.  Step 2: To give a sliced sausage look, draw one more curve as shown. Line inner side with another faint curve as shown.   Step 3: Erase the inner line leaving the faint impression and mark the posit...
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How to draw human digestive system The human digestive system starts with mouth and ends with anus. Intake of food into to mouth is called Ingestion.Mouth encloses a cavity within called Buccal cavity or Oral cavity. Three pairs of salivary glands pour their secretions called saliva in to this cavity. The muscular tongue pushes the food under grinding teeth as it mixes with saliva, this process is called "Mastication". Mastication makes the food into ball of paste. Salivary amylase" an enzyme in saliva starts the digestion of starch right away from mouth. As soft ball of food enters Oesophagus, the wavy movements (Peristaltic movements) drive the bolus into stomach. Oxyntic cells present in inner lining of stomach secrete Hcl acid which has killing action on Microbes and partially denatures the proteins in food.Slimy mucous secreted my mucous glands of stomach protect inner lining from self destruction due to acid. Gastric juices of stomach starts dig...
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How to draw DNA The DNA has twisted ladder or double helical structure. According to Watson and Crick DNA molecule consists of two polynucleotide chains wrapped helically around each other, with the sugar- phosphate chain on the outside forming ribbon-like backbone of double helix. Purines and pyrimidines on the inside of the helix projecting between two sugar phosphate backbones as transverse bars. The two polynucleotide strands are held together by hydrogen bonds between specific pairs of Purines and Pyrimidines.  Now let's see how to draw DNA accurately.  1.Draw two vertical parallel lines as shown with pencil. 2. Draw a twisted wave touching two lines on either sides. 3. Draw another wavy curve as shown. Start the second curve  a bit near the first curve to get proper grooves of DNA. 4. Make ribbon shape on  the strands as sho...
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