The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..
Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..
Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..
A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..
Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..