1 Male cats are more likely to have obstruction of the urethra due to stones because the urethra is longer and narrower in males than in females. 2  This may result in a higher risk of bladder rupture. 3  Also male cats can have abnormalities of the prostate gland that cause obstruction of the urethra.
Abundances of the Elements in the Earth's Crust. Given the abundance of oxygen and silicon in the crust, it should not be surprising that the most abundant minerals in the earth's crust are the silicates. Although the Earth's material must have had the same composition as the Sun originally, the present composition of the Sun is quite different.
What is the most abundant element in the earth? Earth has oxygen and silicon which make 75% while in the human body oxygen, hydrogen, and carbon make up over 90% of it.In short its oxygen.he fourth most abundant element in the universe by mass is carbon. The most abundant is hydrogen, then helium, followed by oxygen.