Question

Commen ovídut of Scoliodon is formed by the
union of​

Answer 1

Answer:

heart of Scoliodon is a bent muscular tube between the two series of gill pouches. - The central nervous system consists of the brain and spinal cord. The brain of dog fish is highly organised. The olfactory sense organs are well developed in scoliodon.

Answer 2

Answer:

The common oviduct of Scoliodon is formed by the union of two oviducts or Mullerian ducts.

Explanation:

The reproductive organs of female Scoliodon consist of

• 1 pair of ovaries attached on either side to the anterior abdominal wall by a fold of peritoneum called Mesovarium.

• The surface of the ovaries projects into rounded follicles or egg sacs each containing a developing ovum. Mature ova are ejected into the abdominal cavity from where they enter the oviducts.

• Mullerian ducts or 2 oviducts are very large tubes, extending the whole length of the body cavity.
• Ostium or oviducal funnel or a common oviduct is a type of coelom that is formed when the narrow ends of 2 oviducts unite mid-ventrally by a single longitudinal slit, below the esophagus, near the septum transversum.
• Oviducts also bear shell glands for a short distance that secrets a thin membrane over the descending eggs which are fertilized between the oviducal funnel and shell gland.

• Posteriorly the 2 oviducts unite to form a wide chamber called the uterus in which embryos develop.