Why do we use directional terminology in anatomy?
Understanding terminology ensures doctors and technicians have a shared method of communicating, which helps to avoid confusion when pinpointing structures and describing locations of lesions. Knowing your directional terms makes things clear and saves time!
What are the regional terms in anatomy?
Regional directional terms include anterior and posterior, dorsal and ventral, and lateral and medial.
What is superficial position?
Superficial describes a position closer to the surface of the body. The skin is superficial to the bones. Deep describes a position farther from the surface of the body.
What is antigen pollen?
pollen antigen the essential polypeptides of the pollen of plants extracted with a suitable menstruum, used in diagnosis, prophylaxis, and desensitization in hay fever. antigen presentation the presentation of ingested antigens on the surface of macrophages in close proximity to histocompatibility antigens.
What is directional term?
Key Terms. directional terms: Directional terms are words used to describe the location of an anatomical structure by comparing its position to other structures within the body or within the orientation of the body itself.
What is peripheral and superficial?
Peripheral refers to anything away from the center and perceiving the outer edges of things. (The opposite is central.) Superficial refers to structures closer to the exterior of the body. (The opposite is deep.)
What is superficial and deep in anatomy?
Deep refers to structures closer to the interior center of the body. For example, bones in an appendage are located deeper than the muscles. Superficial is used to describe structures that are closer to the exterior surface of the body. For example, the outer layers of skin are superficial to deeper layers of skin.
What is the difference between an antigen and an allergen?
People with allergies make IgE (instead of IgG) to common (often environmental) antigens. These antigens are called allergens in this context, but there is no difference between an allergen and an antigen – the difference is in the person and their immunce response.
What is an example of a directional term?
We can also use directional terms for internal structures. For example, the lungs are lateral to the heart and the heart is medial to the lungs. View fullsize. Anatomical Directional Terms: Examples of medial and lateral using the heart and lungs.
What does superficial mean in anatomy?
on the surface
Superficial: In anatomy, on the surface or shallow. As opposed to deep. The skin is superficial to the muscles. The cornea is on the superficial surface of the eye. For a more complete listing of terms used in medicine for spatial orientation, please see the entry to “Anatomic Orientation Terms”.
What does pollex mean in medical terms?
Medical Definition of pollex : the first digit of the forelimb : thumb WORD OF THE DAY
What is an antibody?
An antibody is a protein component of the immune system that circulates in the blood, recognizes foreign substances like bacteria and viruses, and neutralizes them. After exposure to a foreign substance, called an antigen, antibodies continue to circulate in the blood, providing protection against future exposures to that antigen.
What is the pollex of a vertebrate?
The pollex is nearly or quite as long as the second digit, and as a rule the digits then successively diminish in size. The Vertebrate Skeleton|Sidney H. Reynolds. In Anura the pollex is represented only by a short metacarpal. The Vertebrate Skeleton|Sidney H. Reynolds.
Is the pollex postaxial or pentedactylate?
In the anterior limb the radius and the pollex are pre-axial, the ulna and the fifth finger are postaxial. The posterior limb is, as a rule, pentedactylate, but in nearly every case the pollex is vestigial or absent. The hand consists of four complete digits, and a vestigial pollex reduced to a short metacarpal.