Human head
Human Head
The Human Head (pronunciation: /ˈhjuːmən hɛd/) is the uppermost part of the human body, housing the brain and several sensory organs, including the eyes, ears, nose, and mouth.
Etymology
The term "head" comes from the Old English "heafod", which is of Germanic origin; related to Dutch "hoofd" and German "Haupt".
Anatomy
The human head consists of several key components:
- Skull: The bony structure that provides a protective cavity for the brain. The skull is composed of two parts: the cranium and the mandible.
- Brain: The organ of the body in the head that controls functions such as thinking, understanding, learning, and remembering.
- Eyes: The organs of sight that detect light and convert it into electro-chemical impulses in neurons.
- Ears: The organs of hearing and balance, they detect sound and translate it into nerve impulses for the brain to interpret.
- Nose: The organ of smell and entrance to the respiratory tract, it also conditions the air we breathe.
- Mouth: The opening through which food and drink enter the body, and through which speech sounds are produced.
Functions
The human head serves several functions, primarily housing the brain and sensory organs. It allows for a wide range of sensory input, including vision, hearing, smell, and taste. The head also contains the mouth, which is used for communication, eating, and breathing.
Related Terms
- Cranium: The part of the skull that encloses the brain.
- Mandible: The lower jawbone in mammals.
- Cerebrum: The principal and most anterior part of the brain.
- Cerebellum: The part of the brain at the back of the skull that coordinates and regulates muscular activity.
- Medulla Oblongata: The continuation of the spinal cord within the skull, controlling respiration and heart rhythms.
External links
- Medical encyclopedia article on Human head
- Wikipedia's article - Human head
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