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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

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Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

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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.

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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

he vertebrate stomach as an example of an organ composed of all four tissue types he vertebrate stomach as an example of an organ composed of all four tissue types
Microscopic image of prostate cancer. The tissue on the right is somewhat normal; the tissue on the ... Microscopic image of prostate cancer. The tissue on the right is somewhat normal; the tissue on the ...
Invasive tumor: Tumor of the trachea invading and occluding airway. Invasive tumor: Tumor of the trachea invading and occluding airway.
Aging and Bone Tissue Aging and Bone Tissue
Lungs Lungs
The heart and its major blood vessels. Oxygen-rich blood is pumped from the lungs to the left The heart and its major blood vessels. Oxygen-rich blood is pumped from the lungs to the left
Video: Brain Anatomy Animation (Part 2 of 2)

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