Parts of the circulatory system
By: Maggie O'Cala
The human body's circulatory system is similar to a heavily traveled highway. Transporting oxygen, food and water to various areas throughout the body it delivers these needed materials to billions of cells. The circulatory system also gets rid of wastes which would be harmful to...
Introduction to the human muscular system
By: Maggie O'Cala
The human muscular system is responsible for roughly one half of the body's weight. You may have heard someone complain about gaining weight with exercise instead of losing it. This occurs because the cells that make up individual muscles increase in size and weigh more...
Common diseases caused by bacteria
By: UmiNoor
Human beings can be infected with diseases that are caused by bacteria, viruses or parasites. There are also other microscopic life forms that can cause infectious diseases in humans. These minute organisms live in or on the body, and they can be passed on from...
By: Sam E. Jones
Hemorrhoids are when veins in the anus become enlarged to the point where the surface area above the vein becomes itchy or painful. Hemorrhoids are in essence the same thing as varicose veins, the difference being the location of the veins. Because the anus is...
By: John Atchison
Few things in life can amaze us more than the wonders that science provide us on an almost daily basis. After all, scientists are either inventing revolutionary new things or finding solutions to age old problems even as we speak. However sometimes they make breakthroughs...
Three basic types of vaccines: Modified live, killed and toxoid
By: Effie Moore Salem
Vaccines protect the body against diseases in one of three ways, weakened live organisms, killed organisms or by a toxoid method. The first method, with live viruses ensure against the disease, but the live organism will have been weakened to the point they will not...
By: Dr Pandula Siribaddana
Piconavirus belongs to a family of RNA viruses and more specifically to the piconaviridae family. It contains several genera and one of these is the enteroviruses. Being second only to the viruses causing common cold with regard to infectivity potential, enteroviruses are the 2nd commonest...
An overview of chromosomes
By: Hans Hell
Chromosomes are microscopically visible (when stained) structures in a cell which appears during cell division, called mitosis. Between the cell divisions the chromosomes will be loosened and is visible as a diffuse network in the cell nucleus and the individual chromosomes can no longer be...
Function and importance of the thyroid gland
By: Vilie Farah
The thyroid gland is a small endocrine gland that produces two types of hormones. Nearly 93 percent of its production is the inactive T4 and about seven percent is T3 – a hormone that is in its active state.T4, the inactive hormone produced by...
Can hearing impairment cause learning disabilities in children?
By: Laura Lamp King
In the US, infants have their hearing tested at birth in most states, and usually pediatricians inquire about and check a child's hearing at regularly scheduled 'well visits.' Most children also undergo hearing screenings as part of a national program while in elementary school...

 

1 203 204 205 206 207 296