Did you know?
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
Did you know?
Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
Did you know?
In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.
A typical joint.
A typical ball-peen hammer.
A cross section of a typical wax-actuated thermostat showing the position of the wax pellet and ...
A typical two-step ECT circuit showing that when the coolant temperature is low, the PCM applies a ...
A typical belt-driven AIR pump. Air enters through the revolving fins behind the drive pulley. The ...
Typical sandwich bar