A look at coronary circulation
By: Robert W. McDonald
Although the heart is the critical organ involved in the circulation of blood throughout the body, the heart muscle itself relies upon two relatively small arteries to supply its demand for oxygen and nutrients. This article will provide an overview of the heart's own blood...
What are the types of white blood cells?
By: Leanne Black
White blood cells are cells circulating in the blood that defend the body from foreign invaders. They are considered part of the immune system. There are five major types of white blood cells: neutrophils, eosinophils, basophils, lymphocytes, and monocytes. Neutrophils, eosinophils, and basophils are known...
The different types of organ systems and their functions in humans
By: Erich Rosenberger M.D.
The human body is a fascinating biological machine. Within the human body are a series of organ systems. Each of these systems is vital to the proper functioning of a person. Many of these organ systems are dependent on each other - what effects one...
Overview of types of skin neoplasms
By: Tarek Musslimani
Neoplasms in the body can be of two types. These are benign as well as malignant neoplasms. In skin neoplasms are also observed benign as well as malignant kinds of tumours. In certain cases benign neoplasms can be premalignant. Namely, they can predispose to malignancy...
By: Wendy R.
The human immune system is very complex, and the body’s largest organ, the skin, provides the first order of defense when a virus, bacteria or some other pathogen tries to get into the body. The skin, which is multi-layered, provides a natural barrier to...
Structure and function of the salivary glands
By: Tarek Musslimani
There are several salivary glands in the mouth, the most important of which are the parotid gland and the submandibular gland in addition to the sublingual gland. In addition to these three types of glands, there are several other small salivary glands which also specialize...
Understanding the human brain
By: Mary Tyrer
The Brain is the most intricate part of the human body. The brain controls how a person's physical movement, his or her ability to learn, understand. In addition, the brain controls every sensation a person experiences. Chemicals in the brain, neurotransmitters, and neurons in areas...
How do we sense color?
By: Erich Rosenberger M.D.
The human eye is an amazing structure. With your eyes, you are able to see the world around you. But vision in humans is more than just seeing the basic objects, it also allows us to perceive color. How we sense color is actually a...
Difference between systemic and pulmonary circulation
By: Alicia M Prater PhD
The function of the human circulatory system is to transport oxygen and nutrients to the tissues, but also to transport wastes to the kidneys and lungs for excretion. The system, known collectively as circulation, is a series of blood vessels filled with plasma and blood...
Overview of the functions of saliva
By: Joseph Gray - 558640
Saliva is a fluid produced in the mouths of most animals. In humans it is produced by three pairs of salivary glands, the parotids in each cheek over the jaw and in front of the ears, the submandibular glands at the back of the mouth...

 

1 52 53 54 55 56 94