Tag Archives | Ascidiacea

Circulatory System of Herdmania (With Diagram) | Chordata | Zoology

The circulatory system of Herdmania includes heart and pericardium, blood vessels and blood. Blood: The blood is slightly reddish vacuole and transparent. It has colourless plasma, many pigmented and non-pigmented corpuscles, and a few colourless amoeboid leucocytes. Leucocytes are nucleated, amoeboid and colourless. Other corpuscles are round, of various sizes, some have vacuoles, and they may or may not be [...]

By |2017-07-03T08:33:17+00:00July 3, 2017|Herdmania|Comments Off on Circulatory System of Herdmania (With Diagram) | Chordata | Zoology

Nervous System of Herdmania (With Diagram) | Chordata | Zoology

In the adult there is a brain or nerve ganglion which is about 4 cm long. It lies embedded in the mantle mid-dorsally between the two siphons. The brain lies below a neural gland in family Pyuridae to which Herdmania belongs, but in most ascidians the position of the brain is dorsal to the neural gland. The brain has bipolar [...]

By |2017-07-03T08:33:17+00:00July 3, 2017|Herdmania|Comments Off on Nervous System of Herdmania (With Diagram) | Chordata | Zoology

Digestive System of Herdmania (With Diagram) | Chordata | Zoology

In Herdmania, digestive system includes the alimentary canal and digestive glands. Lying in the atrial cavity inside the mantle is a large bag-like pharynx or branchial sac. The wall of the pharyx is fused to the mantle along the anterior and ventral sides, on account of this attachment the atrial cavity is divided into right and left halves which are, [...]

By |2017-07-03T08:33:17+00:00July 3, 2017|Herdmania|Comments Off on Digestive System of Herdmania (With Diagram) | Chordata | Zoology
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