1. it helps with digestion
Answer:
i have no idea ....................
Answer:d. law of universal gravitation
Explanation:
1. Pathogens enter the body through a cut in the skin
2. Cells recognize the foreign invaders
3. Histamine is released
4. White blood cells travel to the invaded area
Hope it helps.
<span>The visual cliff is a laboratory device for testing <u>depth perception</u> in infants. This device is basically an apparatus that resembles a cliff, on top of which a child is placed so as to check its perception of depth from the cliff to the bottom of it. This is important so as to check whether the child has visual or motor problems. </span>