|
|
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.
During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
![Water striders serve as a model organism for the study of sexual conflict between males and females.](https://biology-forums.com/gallery/47/medium_33_09_09_11_10_15_38_17251747.jpeg)
![California ground squirrel (Spermophilus beecheyi) in the man-made rocky shoreline of the Berkeley M](https://biology-forums.com/gallery/47/medium_27692_23_04_12_3_42_52.jpeg)
![In a developmental systems approach, the emergence of social smiling at 6 to 8 weeks of age is not ...](https://biology-forums.com/gallery/47/medium_660365_18_01_17_1_37_00_24476363.png)