Wood units A simplified measurement of pulmonary vascular resistance that uses pressures instead of more complicated units measured by subtracting pulmonary capillary wedge pressure from the mean pulmonary arterial pressure and dividing by cardiac output in liters per minute...
The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..
Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..
This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..
Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..
There are many environmental factors that arise due to the usage of water in one way or another and for every action tha..
The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..
