Final answer:
The skin becomes thinner with less connective tissue and antibody secretions as a person ages. This is due to changes in the integumentary system and the immune system.
Step-by-step explanation:
The skin becomes thinner with less connective tissue and antibody secretions and immune cell number are reduced as a person ages. This is due to the changes that occur in the integumentary system, which is responsible for the structure and function of the skin.
As a person ages, there is a decrease in cell division and metabolic activity, leading to a thinner epidermis and a reduced ability of the dermis to regenerate. Additionally, the accessory structures, such as hair follicles and sweat glands, have reduced activity. This results in thinner hair, reduced amounts of sebum and sweat, and a paler skin tone.
Furthermore, aging also affects the immune system, with a decline in immune function known as immunosenescence. This can lead to a weakened response to pathogens and a reduced ability to produce antibodies. Overall, these changes in the integumentary system and immune system contribute to the thinning of the skin and decreased immune response in older individuals.