Scientists identify a role for bone in male fertility
By: Alicia M Prater PhD
Sex steroids, or androgens, in men have well known functions in reproduction and fertility, specifically the ‘male’ hormone testosterone. A lesser known function is the effect of testosterone and other steroid hormones on the development of the skeleton. In the March 4, 2011, issue...
10 unusual facts about the human body
By: Sandra Piddock
The human body is a miraculous machine. With around 206 bones and 650 muscles, and a heart which is around the size of a grapefruit, the body keeps people moving, breathing and functioning with little or no outside help. That in itself is something of...
The role of hormones in the human body
By: Sue Rebecca
For the proper growth and development of the human body, for the regulation of energy levels and other vital body functions, and for the ability to produce offspring in male and female, as well as for the maintenance of various metabolic processes in the body...
10 unusual facts about the human body
By: Nan C Avery
Think about the human body. What is 5 + 5? Did you know that it took 10 watts of power to complete this simple task? Most light bulbs are 100 watts of power to light a room. A person uses one-tenth of a 100 watt...
The role of hormones in the human body
By: Ann Major
Hormones in the body are chemical messengers that relate signals or information from one set of cells to another. Specific hormones are secreted by a collection of glands which form the Endocrine System. Together, over 50 hormones serve to regulate various bodily processes such as...
Difference between respiration and breathing
By: Jeff Mcclung
The Difference Between Breathing and RespirationHumans, as well as all multi-cellular organisms on Earth, depend upon oxygen to produce the large quantities of energy necessary for life and intelligence. This oxygen must be transported from the atmosphere outside out bodies to the mitochondria, the cellular...
Different types of muscles and muscle movements
By: Jeff Mcclung
While there are three types of muscle tissue (smooth muscles, cardiac muscles, and skeletal muscles) only the skeletal muscles are under our voluntary control. The smooth muscles of the digestive tract and blood vessels, for example, function below our consciousness and the cardiac muscle responds...
Why platelets are important
By: Cicely Richard
Platelets are the smallest of three major blood cell type, which also includes red and white blood cells. Produced in the bone marrow, tiny, irregularly-shaped platelets circulate in the bloodstream and help blood clot when wounded and prevent excessive bleeding. The University of Oklahoma Health...
Disorders of the endocrine system
By: David James - 468716
Endocrine disorders are usually manifested by an over or under production of hormones that manage/control the functions of various body systems. The endocrine system alongside the immune system is the communication system of the human body. Glands and cells that synthesize and release hormones constitute...
The role of connective tissue in the skeletal system
By: Annie Haycock
The defining characteristic of connective tissue is that it comprises an extra-cellular matrix with a few cells. That means it is found within the body, but outside of the cells that form organs. The few cells that are found within the matrix are mobile &ndash...

 

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