. The anatomy of the domestic animals . Veterinary anatomy. 746 CIRCULATORY SYSTEM OF THE DOG (4) The inferior cervical artery arises at the first rib, and gives off the ascending cervical and transverse scapular arteries. The former runs on the deep face of the brachiocephalicus, in which it ramifies. The latter goes to the anterior border of the subscapularis, and its largest branch (equivalent to the prescapular of the horse) accompanies the suprascapular nerve. (5) The internal thoracic artery is large and sends perforating branches to the pectoral mammary glands. The axillary part of the
. The anatomy of the domestic animals . Veterinary anatomy. 746 CIRCULATORY SYSTEM OF THE DOG (4) The inferior cervical artery arises at the first rib, and gives off the ascending cervical and transverse scapular arteries. The former runs on the deep face of the brachiocephalicus, in which it ramifies. The latter goes to the anterior border of the subscapularis, and its largest branch (equivalent to the prescapular of the horse) accompanies the suprascapular nerve. (5) The internal thoracic artery is large and sends perforating branches to the pectoral mammary glands. The axillary part of the brachial artery gives off the thoraco-acromial and ex- ternal thoracic arteries. The thoraco-acromial artery supplies branches to the deltoid and pectoral muscles. The external thoracic artery passes backward under cover of the deep pectoral. Fig. 615.—Superficial Vessels of Head of Dog. 1, Facial artery; 3, inferior labial artery; 3, artery of angle of mouth; 4> superior labial artery; 5, lateral nasal artery; 6, dorsal nasal artery; 7, superficial temporal artery; S, transverse facial artery; 9, anterior auricular artery; JO, zygomatico-orbital artery; ii, satellite vein of iO; i^, ant. auricular vein; J5, superficial temporal vein; i^. internal maxillary vein; /.5, post, auricular vein; if?, J7, external jugular vein; i5, external maxillary vein; J5, ^3, facial vein; j?0, inf. labial vein; ^J, buccinator vein; ^jS, vena reflexa; j24, superior labial vein; ;85, vena angularis oculi; ^ff, dorsal nasal vein; a, concha; b, parotid gland; c, mandibular gland; d, mandibular lymph glands; e, mylo-hyoideus; /, digaatricus; g, masseter; h, zygomaticua; i, scutularis; k, temporalis; U orbicularis oculi; m, zygomatic arch; n, re- tractor anguli oris; o, buccinator. (EUenberger-Baum, .\nat. d. Hundes.) muscle and ends in the abdominal cutaneous muscle. It sends branches to the mammary glands. The common carotid arteries, left and right, arise in that order from the brachiocephalic.
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