1 It may play a role in offense
2 To capture and digest of food
Ex: Venomous spiders (During eating, they can bite their prey and
paralyzed and extract the body fluids)
3 It may contribute to the animals defense as in protection against predators or aggressors
● Composition
● Molecular size= can increase the absorption of the substance
● Amount or concentration gradient= increase absorption process, unionized
● Solubility, degree of solubilization
● And the rate of blood flow into that tissue
● The properties of the engulfing surface itself
● Pinocytosis