Biology: The human heart
By: Nayab Sh
The human heart, the main organ of the blood circulatory system enclosed in pericardial sac, pumps blood to all body parts. It is the strongest muscular organ of the body and made up of cardiac muscles that work continuously without being fatigued. It comprises four...
Basic terminology of the human heart
By: Lime Red Tetrahedron
Basic Terminology of the Human HeartThe human heart is perhaps the most symbolic and intriguing of the organs in the human body. It has been studied to an astounding extent throughout history, yielding some daunting terminology. Many of the terms used to describe and identify...
Understanding skin, its roles and functions
By: Alicia M Prater PhD
To understand the function of the skin, one first has to know that the skin is made of layers. These layers create a protective sheath on the outside of the body. Because skin covers almost the entire body, notable exceptions being the eyes, it is...
Why chopping an onion makes eyes water
By: Justin Lee
Why do onions make you cry?To answer this question, one needs to understand what the microscopic structure of an onion looks like. Onions are composed of millions of tiny cellular sacs (similar to the individual sacs of an orange or grapefruit, only much smaller)...
Explanation of the complement system of the nonspecific immune response
By: Triana Rathads
Complement cascade is one of the first defences we have against invading pathogens, part of our innate immunity. Complement are serine proteins which work with antibodies to destroy pathogens. Complement controls inflammation, phagocytosis, and lyses some cells (breaks apart, cell death). Macrophages produce complement proteins...
Why humans attract mosquitoes
By: Justin Lee
Why do humans attract mosquitoes?Mosquitoes are attracted to certain chemicals that human bodies exude. Each time a person breathes, thousands of chemicals are released from his pores and mouth (e.g. lactic acid, uric acid, and fatty acids). These chemicals mix with CO2 in...
By: Virginia Gaces
There are three types of blood specimens commonly used in the clinical chemistry laboratory. These are whole blood, serum and plasma. The type of the test determines which specimen should be used.Whole blood includes both the cellular elements and the plasma, so in vitro...
Intellectintelligencegeniusbrainiq
By: Saphira Xenno
Most humans only use 10 percent of their brain. First off, what do we mean by ten percent? Do we mean that only ten percent of our brain tissue is ever active, most definitely not. It has been proven that we use all our faculties...
The structure of the ear
By: Megan Worley
The Structure of the Human EarThe Human Ear provides several functions in addition to providing us with the ability to hear including detecting the heads position and motion and providing a sense of balance. Within the ear there are distinct areas that are involved in...
What is the difference between metaplasia, heteroplasia, dysplasia, neoplasia, hyperplasia, and anaplasia?
By: Justin Lee
People commonly confuse, misinterpret, or incorrectly explain the "-plasias." Health and research journals toss the words "metaplasia," "heteroplasia," "dysplasia," "neoplasia," "hyperplasia," and "anaplasia" throughout their works, but what do these words really mean? It is tempting for readers to...

 

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