Final answer:
Vitamin A plays an essential role in maintaining healthy vision, as well as the health of the skin, bones, and teeth. It acts as an antioxidant and protects PUFAs from oxidation, while also scavenging free radicals.
Step-by-step explanation:
Vitamin A plays an essential role in the human body in maintaining healthy vision. It is necessary for good eyesight, especially in low light conditions. Without enough vitamin A, the ability to see at night can be impaired. Vitamin A is also important for the health of the skin, bones, and teeth. It helps in the maintenance and development of these tissues. Additionally, vitamin A acts as an antioxidant, protecting polyunsaturated fatty acids (PUFAs) from oxidation and helping to scavenge free radicals.