notochord
(Science: embryology) An axial mesodermal tissue found in embryonic stages of all chordates and protochordates, often regressing as maturity is approached. Typically a rod shaped mass of vacuolated cells. It lies immediately below the nerve cord and may provide mechanical strength to the embryo.
Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..
Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..
Apart from vitamins, the human body also requires high energy sources such as carbohydrates and fats. If you want an ove..
Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..
Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..