Orchid morphology of Oncidium. Structures labeled include: petals; sepals; callus; column; column wings; stigma; pollinia and anther cap. Includes a dissection that removes the anther cap to expose the pollinia.

Dissection of a human body 02: the intrinsic muscles of the back (vertebral column, spinal meninges, spinal cord). Warning: content may be unsuitable for the faint hearted.