« previous next »
« previous next »
 

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

The development of ancestral tetrapods. The development of ancestral tetrapods.
Three zones of root growth. Three zones of root growth.
Blocking enzymes in hair follicles promotes hair growth Blocking enzymes in hair follicles promotes hair growth
Development of varicose veins. Development of varicose veins.
The Distribution of Growth Rates, 1975–2009 The Distribution of Growth Rates, 1975–2009
Other Endocrine Tissues and Organs, Eicosanoids, and Growth Factors Other Endocrine Tissues and Organs, Eicosanoids, and Growth Factors
Video: Structures that affect circulation - venous return

For a complete list of videos, visit our video library