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.
What Causes Anemia? Dietary iron, vitamin B-12, and folate are essential for red blood cells to mature in the body. Normally, 0.8 to 1 percent of the bodyâs red blood cells are replaced every day and the average lifespan for red cells is 100 to 120 days. In general, any process that has a negative effect on this balance between red blood cell production and destruction can cause anemia.