There are multiple reasons you could feel tired.
Dehydration, Anxiety, lack of sleep, poor diet, and many more things.
Answer:
The major bones of the arms (humerus, radius, and ulna) and the legs (the femur, tibia, and fibula) are all long bones. The flat bones include the scapula (wingbone), the ribs, and the sternum (breastbone). Irregular bones: Irregular bones are irregular in size and shape and are usually quite compact.
Explanation:
to keep your muscles warm to increase flexibility and reduce the chance of cramps.
The glial cells forming myelin sheaths are called oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system. The gaps (approximately 1 micrometer wide) formed between myelin sheath cells long the axons are called Nodes of Ranvier.
hope this helps :p
