« previous next »
« previous next »
 

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Water-conducting cells of the xylem. Water-conducting cells of the xylem.
Food-conducting cells of the phloem. Food-conducting cells of the phloem.
Red cells have a biconcave shape. Red cells have a biconcave shape.
The amount each injector is able to flow is displayed in glass cylinders are each injector for a ... The amount each injector is able to flow is displayed in glass cylinders are each injector for a ...
Red Blood Cells Red Blood Cells
Skeletal muscle Skeletal muscle
Video: Embryonic development - Week 3

For a complete list of videos, visit our video library