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Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.

The lymphatic system. Lymphatic vessels, major lymph nodes, and lymphatic organs. The direction of l The lymphatic system. Lymphatic vessels, major lymph nodes, and lymphatic organs. The direction of l
The lymphatic system. The lymphatic system.
The lymph node structure. The lymph node structure.
Schematic drawing of initial/terminal (I/T) lymph vessel. Schematic drawing of initial/terminal (I/T) lymph vessel.
Lymph node structure. Lymph node structure.
Palpating lymph nodes: Supraclavicular Palpating lymph nodes: Supraclavicular
Video: Hormonal feedback loop components & Glucagon (glycogenolysis and gluconeogenesis)

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