The largest reptile in the world is the saltwater crocodile, generally 13 to 18 ft. long and weighing up to 2,200 lbs. Females are smaller, usually 7 to 11 ft. and 1,000 lbs.
Possible causes of anemia include: 1  Certain medicines. 2  Destruction of red blood cells earlier than normal (which may be caused by immune system problems) 3  Long-term (chronic) diseases such as chronic kidney disease, cancer, ulcerative colitis, or rheumatoid arthritis.
The most common cause of anemia is iron deficiency. This means that you are not getting enough iron in your diet. Iron is necessary for carrying oxygen in the hemoglobin of your red blood cells. These cells carry oxygen throughout your body, giving you energy.