Question 6:  Stained limbs. [6 marks].

Place an Alcian-blue stained chicken embryo under the dissecting microscope. Examine the forelimb (wing) of one of the stained embryos and take a photo.

Label the humerus, radius, ulna,  phalanges.   (No need to label metacarpus ) (Upload your image)  (4 marks)

On the uploaded image , answer this question:  How many digits (phalanges) does the chicken embryo have on the forelimb?  (2 marks).