Sumanas
Sumanas Inc: Life: The Science of Biology: The Ovarian and Uterine Cycles
What exactly happens when you ovulate? This tutorial explains what happens including what hormones are released and when.
BiologyWise
Biology Wise: Roundworm Facts
Characteristics of roundworms, an intestinal parasite, are described, including anatomy, reproduction, habitat, and what happens when a human is infected by them.
BiologyWise
Biology Wise: Roundworm Characteristics
Describes roundworm characteristics, including their classification, habitat, reproduction, infection of humans and pets, and how they are transmitted to other hosts. Includes some examples and the diseases they cause.