What are platelets?
By: Jose Juan Gutierrez
Platelets (thrombocytes) are irregularly shaped colorless corpuscles that circulate in the blood. The function of platelets is to prevent bleeding (hemostasis). Each platelet contains within them, compounds that enable them to stick to each other and to a damaged vessel wall. When a vessel gets...
Anatomy: The structure and function of the wrist
By: Denise Loar
The wrist, also known as the carpus, is located on the proximal region of the hand. Connected by several ligaments, there are eight small bones (carpals) arranged in two rows of four that articulate with each other, along with the radius and ulna. They are...
Anatomy: The structure and function of the knee
By: Tyler Bullock
Bad knees. Everyone has heard about someone with a chronic knee ailment, particularly among the elderly in the community. Knee problems usually plague the patient for the remainder of their life and, on top of that, having dysfunctional knees is a huge physical set-back for...
Cells of the immune system
By: Jose Juan Gutierrez
The immune system consists of a vast collection of cells, including lymphocytes and cell-devouring phagocytes. Some of these cells attack all foreign invaders (antigens), while others attack only specific targets. In defending the human body against disease, the immune system cells need to function cooperatively...
Enzymes and secretions in the small intestine
By: Melody St. John
Digestion is a vital body process that is carried out by the organs in the digestive system. It involves the breaking down of food into small molecules that the body can absorb. The small intestine is a key organ in this body system where most...
Enzymes and secretions in the small intestine
By: Alicia M Prater PhD
The small intestine is a long tube-like network connecting the stomach and large intestine. This organ plays a role in both digestion and absorption. Enzymes secreted by the pancreas and intestinal wall and bile from the gall bladder aid in breaking down macronutrients and food...
Human organ systems and their functions
By: Ali Weetly
The human body is a complex and beautifully evolved structure, which is made up, amongst other things, of several main organ systems. These systems have definitive functions which each have an important part to play in the function of the human body as a whole...
Human organ systems and their functions
By: Wendy S. Melton
The human body is made up of several organ systems that work together to keep the body healthy and functioning efficiently. Each of these systems can be broken down into specific parts, with each part playing a unique role in the homeostasis of the body...
The gastrointestinal tract and immune function
By: Effie Moore Salem
The gastrointestinal tract and the immune system works closely together to keep the body balanced and to keep potentially dangerous organisms from upsetting the carefully mapped out DNA functions put in place at the beginning of life. Overall, the immune system polices the whole body...
Structure of the gastrointestinal tract
By: Phyllis Logie
The structure of the Gastro Intestinal Tract (GIT) begins with the mouth which is lined with mucus membrane and contains teeth with which to chew and break up the food. The tongue helps move food and liquid into the esophagus and the salivary glands produce...

 

1 87 88 89 90 91 94