Type study of Herdmania including all organs.pptx

Type study

1. UROCHORDATES HERDMANIA- TYPE STUDY Presented By- Dr. Harkrishan Assistant Professor C.M.K National P.G Girls College Sirsa

2. HERDMANIA THE SEA SQUIRT

3. Also called mantle . Secretes test and attached to it at atrial and branchial apertures. Three layers:- Outer epidermis Mesenchyme Inner epidermis  Coelom is absent, pericardial cavity around the heart represents the coelom.  ATRIUM is the spacious ectoderm-lined cavity enclosed by the mantle

4. 1. HABITAT:- inhabits rocky beds in coastal waters of Indian seas. Sedentary ascidian. Purse like body , pinkish with red patches. 2. SIPHONS:- branchial and atrial siphons . 3. TEST:- is thick, leathery translucent covering around the body. clear gelatinous matrix fibres corpuscles interlacing fibrils blood vessels 4. Spicules:- Microscleres , Megascleres