Answer:
1. The human body is a mesh of organ systems that are constantly working together to maintain homeostasis and ensure the success of the human and the species as a whole.
2. The structures found in the head, chest, and abdomen are all organs. They are all parts of systems, the brain is part of the nervous system, the mouth, stomach, and intestines make up the digestive tract, and the heart, lungs, and blood vessels make up the respiratory and circulatory systems.
3. 'External' simply means 'outer', and the internal structures are the inner pieces and parts that keep organisms alive, help them grow, and help them reproduce.
4. Arm=Leg, Elbow=Knee, Wrist=Ankle, Hand=Foot.
5. *
*I can't see the actual question part of number 5.
Live virus vaccines<span> use the weakened (attenuated) form of the virus. The measles,</span>mumps<span>, and </span>rubella<span> (</span>MMR<span>) vaccine and the </span>varicella<span> (chickenpox) vaccine are examples. Killed (inactivated) vaccines are made from a protein or other small pieces taken from a virus or bacteria. The </span>flu vaccine<span> is an example</span>
Increased survival rates for those affected by Breast Cancer. Also, a union of community that raises awareness aka non profits that raise money from walks and marathons, etc. On another positive level - it has increased awareness of this cancer to the public via self screenings and breast cancer screenings via mammagrams thus resulting in earlier interventions that in turn increase survival rates.
Telescopes are used to detect light waves emitted from distant space objects. And the Hubble Space Telescope is one of the most famous optical telescopes in orbit.