Informative biology

Pharmacology:-
Topic- Bioavailability- fraction of a drug that reaches systemic circulation from a given dose

Course of the parotid duct. Also note the structures pierced by it during its course from the parotid gland to the
vestibule of the mouth.
📚💊💉

Sites of origin and termination of the parotid duct.
📚💊💉

Patey’s faciovenous (neurovenous) plane in the parotid gland. The retromandibular vein is not shown for clarity: A, two lobes joined by an isthmus; B, superficial lobe is removed after dividing on isthmus leaving facial nerve and
its branches intact.
📚💊💉

The structures traversing the parotid gland: A, facial nerve; B, retromandibular vein; C, external carotid artery
📚💊💉

The structures emerging at the periphery of the parotid gland.
📚💊💉

Origin and insertion of the splenius capitis. The part of splenius cervicis is also seen.
📚💊💉

Origin and insertion of the infrahyoid muscles.
📚💊💉

The carotid triangle is one of the natural geometrical formations of the neck. The triangle is located anterolaterally on each side of the neck. 
Carotid triangle: A, boundaries and floor; B, boundaries and contents
📚💊💉

Origin and insertion of the platysma
📚💊💉

Lacrimal apparatus
💉💊🎓📚 📚💊💉 #