Clubbing is an enlargement of the ends of the fingers and a downward sloping of the nails. Although it's not caused by chronic obstructive pulmonary disease (COPD), it can be a sign of coexisting lung cancer or other lung disorders in patients with COPD. Clubbing is sometimes called digital clubbing. It can affect the fingers and/or toes.
Relatives. Darwin's finches can be divided into groups based on beak type. There are three species of tree finch: the small tree finch, medium tree finch, and large tree finch. Tree finches have grasping beaks.
Haversian systems are only found in compact bone. Their specific arrangements within compact bone contribute to the strength of this osseous tissue type. Cancellous or spongey bone is found forming the core of most flat and irregular bones. It is also very prevalent in the epiphyses(ends) of long bones.The construction of this osseous tissue type is quite different than that of compact bone.One key difference is the absence of osteons!ancellous or spongey bone is found forming the core of most flat and irregular bones. It is also very prevalent in the epiphyses(ends) of long bones. The construction of this osseous tissue type is quite different than that of compact bone. One key difference is the absence of osteons!