Part I:  Middle AdulthoodPhysical, Cognitive and Psychosocial Development in Middle AdulthoodChapters 15 and 161. What physical changes generally occur during the middle years, and what is...

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Development
Chapter 15 and 16

1 Answer
In the middle years, there are several major physical changes. There are changes in hearing and vision, as well as weight gain and increased joint pain. Age has an impact on vision. The eye's lens grows larger as humans age; however, the eye tends to lose some flexibility needed to adapt to visual stimuli (Salin et al.). Presbycusis develops gradually as people age. It appears to be inherited and may be caused by changes in the auditory nerve and inner ear. Osteoarthritis develops gradually and generally appears in middle age. Weight gain is generally associated with ageing. Muscle mass usually declines with age, whereas fat mass grows. The brain works slower and has more complexity in managing multiple tasks (Papalia and Martorell).

2 Answer
Social relationships in middle age are essential to all facets of physiological functioning and subjective well-being, and they inform overall healthcare practices. Research has indicated that having one trustworthy individual—someone with whom middle-aged people can be genuine and believe they will not misuse their secrets—is more essential to happiness than expanding social networks. Becoming a mid-life child commonly entails kin keeping, organising events, and communicating to preserve family ties intact. According to studies, support networks have a significant impact on general well-being...