Changes

*Calcium is absorbed across the intestinal wall in the absence of vitamin D, which other mammals require for calcium absorption.

*Calcium is absorbed across the intestinal wall in the absence of vitamin D, which other mammals require for calcium absorption.

*Less regulated calcium absorption results in calcium being excreted in the urine.

*Less regulated calcium absorption results in calcium being excreted in the urine.

*Parathyroid hormone and calcitonin regulate blood levels.

*Parathyroid hormone and [[Endocrine System - Calcium Homeostasis - Anatomy & Physiology|calcitonin]] regulate blood levels.

**Kidney stones and calcification of soft tissue may occur if a high calcium diet is fed to rabbits for a prolonged period of time.

**Kidney stones and calcification of soft tissue may occur if a high calcium diet is fed to rabbits for a prolonged period of time.