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Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.
Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
![Female individuals of the banded Uromastyx, Uromastyx flavofasciata, are different colours. Most nat](https://biology-forums.com/gallery/47/medium_33_22_09_11_9_37_27_18101556.jpeg)
![Competition can be (a) direct, or (b) indirect interaction among individuals of the same or differen](https://biology-forums.com/gallery/47/medium_33_17_02_12_5_28_58_19442225.jpeg)