(iii) A brachial artery to the arm.
Trace the dorsal aorta backwards, and note that it gives rise to the cœliaco-mesenteric artery about midway between its origin and the origin of the first pair of renal arteries. The dorsal aorta then passes between the kidneys giving four renal arteries to each, and proceeds backwards and divides into an internal iliac artery to each leg. This artery lies between the femoral and the sciatic veins. From each of these arteries a branch is given off which divides into:
(i) An iliac artery to the muscles around the ilium.
(ii) A cutaneous artery to the skin of the body, just anterior to the leg.
(iii) A small artery to the anterior dorsal surface of the hind limb.
3. Trace the pulmo-cutaneous arch, which gives off:—
(a) A pulmonary artery, running along the outer side of the whole length of the lung.
(b) A cutaneous artery, which at first runs forwards to the base of the arm, and becomes spread out on the skin of the back of the head.
[In the Frog
1. The carotid arch gives off:—