Why humans have hair?what is the purpose of having hair?

Charlie is easily winded during soccer practice and wants to improve his cardiorespiratory fitness. which activity would be best for him to choose? lifting weights walking from one class to another running in a 5k race riding a bike at a leisurely pace

Cognitive development discussion question: must be at least 1 paragraph. how can you demonstrate responsible personal and social behavior during physical activities? *example: responsible personal behavior- locating dangers in your surroundings on a field; i.e. man hole covers, brick signs, holes, broken glass, etc. *example - acknowledge the performance of others, no matter the outcome *example: responsible social behavior – learning to accept rulings from officials, handling stressful situations, knowing your team role and doing your job *example - practice conflict management and listening skills in a competitive atmosphere

Which two levels of the spine that can undergo flexion and extension?