« previous next »
« previous next »
 

Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Floral tubes and coevolved pollinators Floral tubes and coevolved pollinators
Pollen tubes delivering sperm to ovules. Pollen tubes delivering sperm to ovules.
Comparison of the branching air tubes in (a) an insect and (b) a mammal. Comparison of the branching air tubes in (a) an insect and (b) a mammal.
Vacutainer evacuated specimen tubes with Hemogard closure blood collection tubes. Vacutainer evacuated specimen tubes with Hemogard closure blood collection tubes.
The tubes and fins of the radiator core. The tubes and fins of the radiator core.
Female Reproductive System - Fallopian tubes "قناة فالوب الجهاز ... Female Reproductive System - Fallopian tubes "قناة فالوب الجهاز ...
Video: Photosynthesis and Van Helmont Experiment

For a complete list of videos, visit our video library