This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Nutrient artery supplying the bone enters from which end 
Select and explain. 
A. Away from the growing end, B. Towards the growing end, C. No fixed entry point, D. Metaphyseal end
A: Away from the growing end
Answer: A: Away from the growing end 
Explanation: Nutrient artery: it enters the shaft through nutrient foramen run obliquely through the cortex and divides into ascending and descending branches in the medullary cavity
The nutrient artery supplies medullary cavity, inner 2/3 of cortex and metaphysics
Each branch divide into a number of small parallel channels which terminate in the adult metaphysis by anastomosing with epiphysial, metaphysical and periosteal arteries