Anatomy Questions

Orbital Anatomy

• The apex of the orbit is directed upward.
• The optic canal represents the apex of the orbit, connecting the orbit to the middle cranial fossa.

Muscles of the Eye

• The levator palpebrae superioris muscle is supplied by the oculomotor nerve.
• The lateral rectus muscle is supplied by the abducent nerve.
• The superior oblique muscle is supplied by the trochlear nerve.

Thoracic Anatomy

• The suprasternal notch is significant for localizing the trachea, which must be centrally located normally.
• The sternum is used for bone marrow aspiration due to its hematopoietic activity throughout life.
• The thymus is a primary lymphoid organ responsible for the development of B lymphocytes.
• The thymus starts to slowly shrink and becomes replaced by fat once you reach puberty.
• The largest lymphatic vessel in the body is the thoracic duct.
• The pulmonary veins receive oxygenated blood from the lungs, delivering it to the left side of the heart to be pumped back around the body.

Pelvic Anatomy

• The sacrum forms the posterior wall of the pelvis.

Thoracic Cage Anatomy

• The manubriosternal angle (angle of Louis) is formed by the articulation of the manubrium and body of the sternum.
• The manubriosternal angle lies at the level of the 1st costal cartilages anteriorly and opposite to the lower border of T3 posteriorly.

Intercostal Muscles

• The external intercostal muscle is an inspiratory muscle that elevates the ribs.

Surface Anatomy

• The nipple is used to localize the location of the apex beat of the heart.