Skin, nails and hair make up the
a. skeletal system.
b. integumentary system.
c. muscular system.
d. endocrine system.

b. integumentary system.

Explanation:

Integumentary system includes the skin and other protective appendages of the body which provides protection against the loss of water, injury and other damages could be caused by the external environment. The integumentary system involves hair, feathers, nails, scales and hooves. It also functions in eliminating the waste products, protecting the body from diseases and regulating the body temperatures.

On the basis of the above explanation, Skin, nails and hair make up the integumentary system is the correct option.

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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