A rock.
It could not get cancer because it is not a living organism. Hope this helps you.
Blood flow goes from the heart, to the lungs, and back to the heart again.
Breeding and Breathing the exchange gas through their skin, their skin has to be moist to cause the exchange in gases (Oxygen and Carbon Dioxide).
Are there any choices in the question asked? if ever none. this are the possible answers.
- Ask when is her LMP (last menstrual period).
- Ask if she has or had a boyfriend and is practicing sex; (if yes), ask if they are using contraceptives.,then request for a Pregnancy test. (if no), ask she is in stress lately (stress contribute to delays in menstrual cycle).
- if the pregnancy test came back negative and no stress or problems involve, refer the patient to an OB - gynecologist to see if she has other problems with her reproductive system.
The cortical reaction. It is initiated during fertilization by the release of cortical granules from the egg, which prevents multiple sperm with one egg.
