Human head

Your head is at the top of your body.

Hard bones called a skull keep your brain safe. There are 22 bones in your head. Your head sits on your neck.

Your face has eyes, a nose, and a mouth. Your ears sit on the sides of your head. Your head helps you see, hear, and taste. It also helps you chew food. Many people wear hats on their heads. Hats can keep you warm or look nice.

Your head is at the top of your body.

It sits on your neck. Seven bones in your neck help support it. The head has a fleshy outer part. Inside, a bony skull protects your brain. There are 22 bones in the human head.

Your face is the front part of your head. It has your eyes, nose, and mouth. Your ears sit on both sides. The head holds many sensory organs. These are parts that help you sense the world. They include your eyes, ears, nose, and tongue. These organs send info to your brain. This helps you process things quickly.

Blood travels to your head through arteries. These are tubes that carry blood. Some arteries go inside the skull. Others go to the area outside. Nerves also help the head work. The facial nerve helps you smile. The trigeminal nerve helps you feel things on your face.

People often wear things on their heads. A hat can keep you warm. It can also be for fashion. Some people wear head coverings for religion. This can show respect in holy places.

The human head is at the very top of your body. It holds your face and protects your brain inside a bony skull. This skull is made of 22 different bones. The head sits on your neck. Seven cervical vertebrae, which are bones in your neck, help support it. Most human heads weigh within a certain range. Over 98% of people fall into this normal weight group.

Your head works like a busy processing center. It contains sensory organs like your eyes, ears, nose, and tongue. These parts send information to your brain about the world. This central nerve cluster helps you process information very fast. Blood also flows to the head through special tubes called arteries. The internal carotid arteries carry blood inside the skull. The external carotid arteries carry blood to the area outside the skull.

Nerves help the head move and feel things. Twelve pairs of cranial nerves provide most of the control. The facial nerve, which is the seventh cranial nerve, lets you smile or grimace. The trigeminal nerve, or the fifth cranial nerve, gives you feeling in your face. Other sensations come from the cervical nerves. Scientists have studied these nerve paths for a long time. Even the famous 1918 book Gray's Anatomy showed these important areas.

People use their heads to recognize one another. Your brain is built to see the small differences in faces. This includes eye color, hair color, and the shape of a nose. Because of this, human babies can tell faces apart very early. Some people think big heads mean high intelligence. However, science shows brain size is only slightly linked to how smart someone is. A study in the United States estimated average head sizes for men and women.

Humans also use head coverings for many different reasons. A hat can be for fashion or to keep you warm. Some hats are hard hats used for safety at work. People also wear head coverings to show respect or for religion. For example, some men wear a yarmulke or a turban. Some women wear a hijab or a nun's habit. These choices can show a person's job, team, or beliefs.

The human head is the uppermost part of the human body. It serves as a vital housing for the brain and the primary sensory organs. The structure is composed of a fleshy outer portion that surrounds a bony skull. This skull contains 22 different bones to provide protection. The head rests upon the neck, which is supported by seven cervical vertebrae. Most human heads fall within a specific weight range, representing over 98% of the population.

Inside the head, the brain acts as a central processing center for the entire body. This is possible because the head contains specialized sensory organs. These include two eyes, two ears, a nose, and a tongue located inside the mouth. These organs gather information from the environment and relay it to the brain. Having this central nerve cluster allows humans to process information very quickly. The skull protects the brain while the jaw and oral cavity allow for speech, chewing, and the start of digestion.

Blood reaches the head through a system of specific arteries. The internal carotid arteries carry blood to the area inside the skull. The external carotid arteries supply the area outside the skull. Additionally, the vertebral arteries provide blood to the interior of the skull. These vertebral arteries travel upward through the transverse foramina of the cervical vertebrae. This constant blood supply is necessary for the brain and facial tissues to function correctly.

Nerves provide the electrical signals required for movement and sensation. There are twelve pairs of cranial nerves that provide most of the nervous control for the head. The facial nerve, known as the seventh cranial nerve, allows for facial expressions like smiling or grimacing. Sensation to the face is managed by the trigeminal nerve, which is the fifth cranial nerve. Other parts of the head receive sensation through the cervical nerves. While modern texts agree on most sensory areas, there are minor variations in specific details.

Human faces are the main way people distinguish one another. We notice features like eye color, hair color, and the shape of sensory organs. The human brain is biologically predisposed toward facial recognition. This is so strong that human infants are programmed to recognize subtle differences in faces. While science fiction often depicts aliens or geniuses with very large heads, brain size is not a perfect indicator of intelligence. Neurobiology shows that brain size is only slightly or moderately correlated with overall intelligence.

Measurements of the head, known as anthropometry, provide interesting data. A British study showed an average head circumference of 57.2 cm for males and 55.2 cm for females. In the United States, researchers have also estimated average circumferences for both sexes. Some medical conditions are linked to head size. For example, macrocephaly can indicate an increased risk for certain cancers in people with Cowden syndrome. In adults, this refers to head sizes larger than 58 cm in men or 57 cm in women.

Throughout history, humans have used head coverings for many different reasons. Headpieces can signal a person's religion, social group, or occupation. In many cultures, covering the head is a sign of respect, especially in holy places. Different religions require specific items, such as the Islamic taqiyah, the Jewish yarmulke, or the Sikh turban. Women may also wear a hijab or a Christian nun's habit. Hats can also be practical, serving as hard hats for safety or simply providing warmth.

The head also holds a significant place in human language and culture. We use many metaphors involving the head, such as the "head of the table" or being the "head of the class." Historically, some cultures practiced headhunting, which involved taking and preserving a person's head. This practice has occurred across the Americas, Europe, Asia, and Oceania for thousands of years.