Fourth day.
Arterial System (continued).
1. Trace the carotid arch, which gives off:
(a) Two lingual arteries having a common point of origin near the carotid gland.
(b) A carotid artery passing to the head. At its origin it is slightly swollen into the carotid gland.
2. Trace the systemic arches which run backwards on each side of the body, meeting posteriorly to form the dorsal aorta. Each systemic arch gives rise to an artery which branches into:—
(i) A scapular artery to the pectoral girdle.
(ii) A cutaneous artery to the skin.