How to draw embryo

The growing embryo forms four membranes-Chorion, Amnion, Allantois and Yolk sac.Chorion establishes connection with the walls of the uterus and helps in the supply of nutrients to the embryo and in the removal of wastes from the embryo. Amnion forms a sac like structure around the embryo. The space between the amnion and embryo is filled with a fluid called Amniotic fluid.Amnion and amniotic fluid give protection to the embryo against mechanical shocks. Amnion is retained till the child is born as the embryo grows the amnion also grows in size. Another sac like structure called Allantois is continuous with urinary bladder of growing embryo. Yolk sac usually supposed to contain reserve food material, but in human embryo it is vestigial and useless.




1.Draw tiny human embryo as shown. 


2.Make Amnion around it as shown. 


3.Draw Yolk sac and Allantois as shown. 


4.Draw one more membrane around as shown, it is Chorion









5.Draw tiny projections called chorionic villi as shown and label the parts.Read more here.

Comments

Post a Comment

Popular posts from this blog

Image
How to draw Nephron Each kidney is made of about one million single units called nephrons. These are the structural functional units of the kidney and concerned with separating urine from the blood. Each nephron is made of two main parts called malpighian body and covoluted tubule.Malphigian body is double layered cup also called bowman`s capsule. The inner cup consists network of capillaries called Glomerulus.                                    Now let`s start the diagram. 1.Draw a egg shape and  make a folded curve as shown in the figure and     attach it to a vertical line. 2. Draw double line along the curve and draw Glomerulus as shown in the      bowman`s capsule. 3. Draw the capillary network as shown in the figure. You may need some patience to represent the intricate network. You can make it simple by drawing the whole capillaries with single thick line, using blunt pencil tip.
Read more
Image
How to draw skin LS Our  skin  is the sense organ for touch. It contains cutaneous receptors for touch. The skin consists of two main layers called epidermis and dermis. Epidermis is the layer for protection. It has outer stratum corneum or cornified layer containing dead cells, middle granular layer containing living cells and inner malpighian layer containing the cells dividing constantly.  Dermis lies below the epidermis. It is made up of elastic connective tissue. It contains sweat glands, sebaceous glands, hair follicles, blood vessels and fat. Here we start the diagram. 1.Draw a cuboid shape as shown.  2.Draw the epidermis and endodermis as shown.  3.Draw hair follicles and other details of the skin as shown.  4. Label the parts as shown. Read more  here 
Read more