EOSC 326 Study Guide - Nautiloid, Siphuncle, Phragmocone

129 views4 pages

Document Summary

The opening in the shell which the soft body protrudes is called the aperture. The phragmocone is made up of a series of gas- filled chambers or camerae. These are separated from each other by hard pieces called septa. A soft- tissue organ called the siphuncle runs through the center of the chambers, connecting them to the mantle cavity. The siphuncle consists of blood vessels, arteries, nerves and other cells contained in an organic sheath. It plays a key role in controlling buoyancy: morphology: Learning objectives: feeding: nautilus are reef predators and scavengers. Their tentacles are sticky and can grab prey, the prey is then passed to the mouth. The mouth is a beak- like jaw that tears up the prey or cracks open shells. Water is taken into the mantle cavity, which is then sealed off, creating an increase in pressure. Nautilus can swim at a maximum depth of around 600m. Laboratory tests have shown that at.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers