Although biotin deficiency is rare, it can develop during pregnancy or in people who have poor nutrition or experience rapid weight loss. Symptoms of biotin deficiency include hair loss, dry skin, a scaly rash around the eyes or mouth, dry eyes, fatigue, and depression.: Biotin is a water soluble B-vitamin (B7). It is essential for good nail and hair growth. Biotin is involved the biochemical metabolism of proteins, carbohydrates and fats into energy. It also plays a part in the synthesis of fatty acids.
These 10 animal facts will amaze you. The coracoid process is a small knob of bone at the top of the scapula, or shoulder blade. It extends outward from the top of the back of the shoulder blade and pokes out underneath the clavicle, or collarbone, on the front of the shoulder.
The primitive streak is a structure that forms in the blastula during the early stages of avian, reptilian and mammalian embryonic development.The presence of the primitive streak will establish bilateral symmetry, determine the site of gastrulation and initiate germ layer formation.he formation of the primitive streak in the blastocyst involves the coordinated movement and re-arrangement of cells in the epiblast. Even before the streak is visible, epiblast cells have started to move. Two counter-rotating flows of cells meet at the posterior end, where the streak forms.