Dark and white meat. Chickens have fast and slow twitch muscle, too. Dark meat, like in chicken legs, is mainly made up of slow twitch fibres. White meat, like in chicken wings and breasts, is largely made up of fast twitch muscle fibres.Chickens use their legs for walking and standing, which they do most of the time.ark and white meat. Chickens have fast and slow twitch muscle, too. Dark meat, like in chicken legs, is mainly made up of slow twitch fibres. White meat, like in chicken wings and breasts, is largely made up of fast twitch muscle fibres.
When people talk about spina bifida, most often they are referring to myelomeningocele. Myelomeningocele is the most serious type of spina bifida. With this condition, a sac of fluid comes through an opening in the babyâs back. Part of the spinal cord and nerves are in this sac and are damaged.
Spina bifida cystica occurs when the lining (membranes) of the spinal cord and sometimes the spinal cord push out through the defect in the spine. The two main types of spina bifida cystica are called meningocele and myelomeningocele: Meningocele. Spina bifida meningocele is the rarest type of spina bifida. The protective membranes (the meninges) surrounding the spinal cord are pushed out between openings in the vertebrae. The meningocele is sometimes covered by a layer of skin.