What feature is indicated by the letter A iliac fossa?

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Bone Markings
Learning Objectives
What is the specific vertebra name of letter A?
What portion of the sternum is identified by the letter A?
On which bone is the greater sciatic notch located ABC?
What is a depression type of bone feature?

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Bone Markings

Learning Objectives

By the end of this section, you will be able to:

Define and list examples of bone markings

The surface features of bones vary considerably, depending on the function and location in the body. Table 7.2 describes the bone markings, which are illustrated in (Figure 7.2.1). There are three general classes of bone markings: (1) articulations, (2) projections, and (3) holes. As the name implies, an articulation is where two bone surfaces come together (articulus = “joint”). These surfaces tend to conform to one another, such as one being rounded and the other cupped, to facilitate the function of the articulation. A projection is an area of a bone that projects above the surface of the bone. These are the attachment points for tendons and ligaments. In general, their size and shape is an indication of the forces exerted through the attachment to the bone. A hole is an opening or groove in the bone that allows blood vessels and nerves to enter the bone. As with the other markings, their size and shape reflect the size of the vessels and nerves that penetrate the bone at these points.

Bone Markings (Table 7.2)
Marking	Description	Example
Articulations	Where two bones meet	Knee joint
Head	Prominent rounded surface	Head of femur
Facet	Flat surface	Vertebrae
Condyle	Rounded surface	Occipital condyles
Projections	Raised markings	Spinous process of the vertebrae
Protuberance	Protruding	Chin
Process	Prominence feature	Transverse process of vertebra
Spine	Sharp process	Ischial spine
Tubercle	Small, rounded process	Tubercle of humerus
Tuberosity	Rough surface	Deltoid tuberosity
Line	Slight, elongated ridge	Temporal lines of the parietal bones
Crest	Ridge	Iliac crest
Holes	Holes and depressions	Foramen (holes through which blood vessels can pass through)
Fossa	Elongated basin	Mandibular fossa
Fovea	Small pit	Fovea capitis on the head of the femur
Sulcus	Groove	Sigmoid sulcus of the temporal bones
Canal	Passage in bone	Auditory canal
Fissure	Slit through bone	Auricular fissure
Foramen	Hole through bone	Foramen magnum in the occipital bone
Meatus	Opening into canal	External auditory meatus
Sinus	Air-filled space in bone	Nasal sinus

Figure 7.2.1 – Bone Features: The surface features of bones depend on their function, location, attachment of ligaments and tendons, or the penetration of blood vessels and nerves.

What is the specific vertebra name of letter A?

Atlas: The bone that articulates with the occipital condyles. 4. Thoracic vertebrae: These bones have articular facets for the ribs. 5.

What portion of the sternum is identified by the letter A?

What portion of the sternum is identified by the letter A? The manubrium is the superior portion of the sternum.

On which bone is the greater sciatic notch located ABC?

On which bone is the greater sciatic notch located? The greater sciatic notch is located along the posterior border of the ilium between the posterior inferior iliac spine and the ischial spine.