Various body changes occur as adults age. Muscles and joints become less flexible, bones and muscles lose mass, energy levels diminish, and the senses become less acute. Women stop releasing eggs and hence can no longer reproduce.
Learning Goal 5d
The length and quality of human life are influenced by genes and environmental factors, including sanitation, diet, medical care, and personal health behaviors.
For Grades: 6-8
Learning Goal 1b
Regular exercise is important to maintain a healthy heart/lung system, good muscle tone, and bone strength.
For Grades: 9-12
Learning Goal 3a
New medical techniques, efficient health care delivery systems, improved diet and sanitation, and a fuller understanding of the nature of health and disease give today's human beings a better chance of staying healthy than their ancestors had.