structure of holobranch of scoliodon
Answers
Explanation:
Respiratory System of Shark (Scoliodon): The respiratory organs are the gills which are borne by the gill-pouches. ... The branchial lamellae are highly vascularized structures. Each gill-pouch has an anterior and a posterior set of branchial lamellae.
Answer:
Scoliodon has an elongated, spindle-shaped body tapered at the ends, making it a very fast swimmer. The trunk and tail are laterally compressed, while the head region is dorsoventrally compressed. The entire body is covered by an exoskeleton of placoid scales.
Explanation:
Scoliodon
Scoliodon is a vertebrate which is naturally found in oceans. They are widely distributed in the oceanic region of Indo-Pacific. Sometimes, they are also found in estuaries. They are predaceous, active swimmers and voracious feeders.
- They have a laterally compressed, long (about 60 cm), spindle-shaped body, which can be distinguished into the head, trunk and tail.
- Their ventral surface is white or pale in colour, while their dorsal and lateral sides are pigmented dark grey.
- The Scoliodon’s head is dorso-ventrally compressed and flattened to form the snout. The head contains obliquely situated nostrils, a slit-like mouth and laterally located protuberant eyes. Five pairs of gill clefts (lateral) are located behind the eyes.
- The trunk portion has lateral paired fins and median unpaired fins. The lateral paired fins include two posterior pelvic and two anterior pectoral fins. Likewise, the median unpaired includes small second dorsal and large first dorsal fins.
- The heterocercal tail with vertebral column and musculature is turned upwards.
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