The pre-caval vein is formed of

Options

A. External jugular and innominate
B. Innominate and sub clavian
C. External jugular, innominate and subclavian
D. External jugular and subclavian

Answer

C

Explanation

Each precaval is formed by the union of three veins:
External Jugular: It receives blood from tongue and roof of bucco – pharyngeal cavity by lingual vein and from the floor of buccopharyngeal cavity and lower jaw by mandibular vein.
Innominate vein: It receives blood from the eye orbit and brain by inter-jugular vein and from the shoulder region by sub capsular vein.
Sub clavian vein: It receive blood from the forelimbs by brachial vein and from skin and muscles of the abdomen and also mucus membrane of mouth and head muscles by musculo – cuteneous vein.