Circulatory System in Finfish and Shellfish

1. Median ophthalmic artery
: I
t arises as a single median 
cephalic or ophthalmic artery from the apex of the heart. It runs 
forward to the head in mid dorsal line. Here is joins the two 
antennary arteries. 

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2.

Antennary Arteries 
originate from apex of the heart one from either of the median ophthalmic. It run s 
forward along the outer border of mandibular muscle and gives out the following 
branches: 
a. Pericardial branch (to pericardium) 
 
b. Gastric branch (to cardiac stomach) 
 
c. Mandibular Branch (to mandibular muscles) 
It further passes forward and divided in to two sub-branches 
a. Dorsal branch 
(Send an optic artery to eye, than bend inwards and 
 
form circulus cephalicus which gives off a pair of rostral arteries to 
 
rostrum) 
 
 
b. Ventral Branch 
(it divides in sub branches, one for antennulary and 
 
second re-divided into two and antennal artery to antenna ant other 
 
renal artery to renal organ) 
 
3. 
Hepatic artery
: 
Paired arteries, 
arise from the ventro-lateral sides of the roots 
of antennary arteries. They open into hepatopancreas. 
4.
 
Median Posterior Artery
: 
I
t is small but stout artery which arise from the 
posterio-ventral surface of the heart and runs backward. It immediately bifurcate in 
to two branches 
a. Supra-intestinal artery (supply blood to intestine and abdominal muscle) 
 
b. Sternal Artery ( divided into two ventral thoracic and ventral abdominal)