#698 What is a nerve?
What is a nerve? They are bundles of nerve fibers called axons that connect neurons. They look like cables. Their job is to transmit electrical impulses. All animals have nerves.…
What is a nerve? They are bundles of nerve fibers called axons that connect neurons. They look like cables. Their job is to transmit electrical impulses. All animals have nerves.…
Watch on YouTube How do facial expressions work? There are 20 muscles in the face that can be moved in different combinations. There are two kinds of facial expressions: voluntary…
How do reflexes work? They work by using a reflex arc that bypasses the brain. There are many different types of reflex, but they are generally meant to protect us…