What is fossa on bone?
In anatomy, a fossa (/ˈfɒsə/; plural fossae (/ˈfɒsiː/ or /ˈfɒsaɪ/); from the Latin “fossa”, ditch or trench) is a depression or hollow, usually in a bone, such as the hypophyseal fossa (the depression in the sphenoid bone).
Where is the fossa in the body?
The fossa is located behind the zygomatic process of the frontal bone in the anterior and lateral part of the orbital roof. fossa for the lacrimal sac A vertical groove, some 5 mm deep and about 14 mm high, formed by the frontal process of the maxilla and lacrimal bones and which contains the lacrimal sac.
What bones contain a fossa?
The middle cranial fossa consists of three bones – the sphenoid bone and the two temporal bones.
What is the meaning of fossa in science?
(Science: anatomy, ornithology) a pit, groove, cavity, or depression, of greater or less depth; as, the temporal fossa on the side of the skull; the nasal fossae containing the nostrils in most birds.
What is the head called in anatomy?
External Websites. Alternative Title: cephalon. Head, in human anatomy, the upper portion of the body, consisting of the skull with its coverings and contents, including the lower jaw.
What is the importance of the head?
The human head is home to all the body’s major sensory organs, and the most important of these is the brain. Although the nose, ears, tongue, nerves, and others parts are important, without a healthy brain, they’d all be useless. Encased in the skull, the brain is the body’s centralized conveyor of all information.
What is the purpose of a head?
Function of the Head The head typically serves as the information processing center of the animal. Information from the sense organs and the body is relayed to the brain, which is the nerve center found in the heads of complex life forms.
Why do we have heads?
In bilaterally symmetrical animals, nervous tissues concentrate at the anterior region, forming structures responsible for information processing. Through biological evolution, sense organs and feeding structures also concentrate into the anterior region; these collectively form the head.
Why did we keep head hair?
Head hair, meanwhile, became thicker and more luxuriant, protecting our ancestors’ brains from the midday sun, and also retaining heat in the cold. Genetic evidence suggests that we became furless around 1.7 million years ago.
Why do humans have round heads?
By analyzing traces of Neanderthal DNA that linger in Europeans from their ancestors’ trysts, researchers have identified two Neanderthal gene variants linked to slightly less globular head shape in living people, the team reports this week in Current Biology. …
Why do we grow hair?
Aside from being good for raising, furrowing, and piercing, the hair there keeps the sweat out of your eyes. And the hair on your head shields your noggin from the direct force of the sun. It also leaves an area of air between your scalp and hair’s hot surface, so sweat can evaporate and cool things down.
Is hair dead or alive?
Tiny blood vessels at the base of every follicle feed the hair root to keep it growing. But once the hair is at the skin’s surface, the cells within the strand of hair aren’t alive anymore. The hair you see on every part of your body contains dead cells.