● `color{Brown}"Body"` is `color{Violet}"unsegmentated"` with various shapes and covered with `color{Violet}"calcerous shells"`. Neopilina shows exceptional segmentation.
● `color{Brown}"Body is divided into three parts"`:
`star` `color{Violet}"Head"`: with sense organs like eyes and Sensory tentacles.
`star` `color{Violet}"Dorsal Visceral mass/ Hump"`: Contains all visceral organs.
`star` `color{Violet}"Ventral muscular foot"` for locomotion
● `color{Brown}"Other structures"`:
`star` A `color{Violet}"soft and spongy layer"` of skin forms a `color{Violet}"mantle"` over the visceral hump.
`star` The space between the hump and the mantle is called the `color{Violet}"mantle cavity"`.
`star` Mantle usually secretes an external `color{Violet}"calcareous shell"` made up of `color{Violet}"calcium carbonate"` and `color{Violet}"concheolin protein"`.
● `color{Brown}"Digestive system"`: Digestive tract is `color{Violet}"Complete"`; the mouth contains a file-like rasping organ for feeding, called `color{Violet}"radula"`.
● `color{Brown}"Respiratory System"`: Usually by feather like `color{Violet}"gills"` present in the mantle cavity.
● `color{Brown}"Circulatory System"`: open
● `color{Brown}"Excretory system"`: Contains 1 or 2 pairs of kidneys called `color{Violet}"Kaber’s organs"` or `color{Violet}"Organ of Bojanus"`. Excretory mater is Ammonia or Uric acid.
● `color{Brown}"Nervous system"` consist of 3 or 4 pairs of Ganglia:
`star` Cerebral ganglia (in head)
`star` Pedal Ganglia (in foot)
`star` Visceral Ganglia (in visceral mass)
● `color{Brown}"Sense organs"`: `color{Violet}"Eye"`, `color{Violet}"Statcosyst/lithocyst"` for locomotion and `color{Violet}"Osphradia"` for testing chemical nature of water.
● `color{Brown}"Body"` is `color{Violet}"unsegmentated"` with various shapes and covered with `color{Violet}"calcerous shells"`. Neopilina shows exceptional segmentation.
● `color{Brown}"Body is divided into three parts"`:
`star` `color{Violet}"Head"`: with sense organs like eyes and Sensory tentacles.
`star` `color{Violet}"Dorsal Visceral mass/ Hump"`: Contains all visceral organs.
`star` `color{Violet}"Ventral muscular foot"` for locomotion
● `color{Brown}"Other structures"`:
`star` A `color{Violet}"soft and spongy layer"` of skin forms a `color{Violet}"mantle"` over the visceral hump.
`star` The space between the hump and the mantle is called the `color{Violet}"mantle cavity"`.
`star` Mantle usually secretes an external `color{Violet}"calcareous shell"` made up of `color{Violet}"calcium carbonate"` and `color{Violet}"concheolin protein"`.
● `color{Brown}"Digestive system"`: Digestive tract is `color{Violet}"Complete"`; the mouth contains a file-like rasping organ for feeding, called `color{Violet}"radula"`.
● `color{Brown}"Respiratory System"`: Usually by feather like `color{Violet}"gills"` present in the mantle cavity.
● `color{Brown}"Circulatory System"`: open
● `color{Brown}"Excretory system"`: Contains 1 or 2 pairs of kidneys called `color{Violet}"Kaber’s organs"` or `color{Violet}"Organ of Bojanus"`. Excretory mater is Ammonia or Uric acid.
● `color{Brown}"Nervous system"` consist of 3 or 4 pairs of Ganglia:
`star` Cerebral ganglia (in head)
`star` Pedal Ganglia (in foot)
`star` Visceral Ganglia (in visceral mass)
● `color{Brown}"Sense organs"`: `color{Violet}"Eye"`, `color{Violet}"Statcosyst/lithocyst"` for locomotion and `color{Violet}"Osphradia"` for testing chemical nature of water.