The lateral end of the clavicle articulates with the acromion process of the scapula forming the acromioclavicular joint.
Hairs are mostly fibrous proteins and are composed of keratin, and also the main constituent of skin, nails, wool, woof, feathers etc.
Keratin is the essential fibrous protein which has a structural and protective functions in the epithelium.
A, sodium.....................................
A. light-independent reactions.
