Persistent Fear and Anxiety Can Affect Young Childrenâs Learning and Development. It is essential that children have safe, secure environments in which to grow, learn, and develop healthy brains and bodies. Science shows that early exposure to circumstances that produce persistent fear and chronic anxiety can have lifelong effects on brain architecture.
Three types of muscles. The muscular system can be broken down into three types of muscles: skeletal, smooth and cardiac, according to the NIH. Skeletal muscles are the only voluntary muscle tissue in the human body and control every action that a person consciously performs. Most skeletal muscles are attached to two bones across a joint, so the muscle serves to move parts of those bones closer to each other, according to The Merck Manual.
Major Muscles of the Human Body. Click on the links below to see the major muscles of the human body in detail with origins, insertions, actions, common injuries and more.ajor Muscles of the Human Body. Click on the links below to see the major muscles of the human body in detail with origins, insertions, actions, common injuries and more.