Question

10 important points of circulatory system of herdmania​

Answer 1

Answer:

please and me brainlist than I say the answer

Answer 2

Explanation:

There are no true blood vessels in most ascidians, but they are well developed in Herdmania. Ventrally the heart opens into a ventral aorta which lies in the pharyngeal wall along the whole length below the endostyle. The ventral aorta near the heart gives out a ventral test vessel supplying blood to the test.Throughout its length the ventral aorta gives out paired transverse vessels which run in the pharynx wall on each side between rows of stigmata. From the transverse vessels arise smaller branches which pass between the stigmata of each row. of the pharynx and then join a dorsal aorta lying above the dorsal lamina in the dorsal wall of the pharynx. It is not connected with the heart. It sends branches to the neural complex, anteriorly to the dorsal tubercle and branchial siphon.

Then it leads posteriorly into a branchio- visceral vessel. The branchio- visceral vessel immediately divides into a right oesophageal vessel for the right liver lobe and right portion of oesophagus, and a ventro-intestinal vessel supplying blood to the left portion of oesophagus, stomach, intestine, rectum, left liver lobe and left gonad