1. Select four body systems and explain the effects of aging on each system. (4 points) 2. Describe how the proportions of the trunk, head, and limbs of the body change between infancy and adulthood....

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Select four body systems and explain the effects of aging on each system. (4 points)
Four body systems and the effect of aging on each:
1) Skeletal system
The skeleton is what provides support and stability to the body. Joints allow the skeletons to move about freely. Bones grow more fragile and are more likely to break.
Bone mass and density loss occur in both men and women beyond the age of 40. Calcium. As the discs lose fluid and become thinner with age, the trunk (the center of the body) becomes shorter..
2) Muscular system
Muscles are not as firm and elastic as they once were. Muscle spasms are common in the elderly.The whole volume of the muscle decreases, leading to loss of energy the body's capacity to resist and constantly muscle effort is weakened.
3) Nervous system
Inside the brain and spine, the number of nerve cells and their volume is reduced. The transmission of messages between the neurons is reduced and can result in irreparable neurological damage and a loss of sensations.

4) Digestive system
Abrasion of taste buds and significant changes in taste.Reduced gastrointestinal movement, leading to consuming contaminated difficulties. In a few situations, gastrointestinal reflux is observed. The hardening of the colon’s inner lining creates difficulties in bowel habits.
2. Describe how the proportions of the trunk, head, and limbs of the body...