Understanding Hair Growth and Function

The video explores why humans have hair on their bodies, focusing on its functions and growth process. Hair on the head keeps it warm and cushions impacts, while eyelashes and eyebrows protect the eyes. Hair grows from follicles under the skin, with the visible part being the shaft. Hair cells are dead at the surface, explaining why haircuts are painless. The video also covers the hair lifecycle, where hair grows, rests, and falls out, with new hair replacing it. Viewers are encouraged to engage by answering a question and subscribing.

What is the main topic introduced in the video?

• Different hairstyles

• The science of hair growth

• The history of haircuts

• Hair coloring techniques

What is one reason we have hair on our heads?

• To improve our sense of smell

• To make us look taller

• To keep our head warm

• To help us hear better

How do eyelashes protect our eyes?

• By limiting light and dust

• By making us look attractive

• By enhancing our vision

• By keeping them moist

Where does hair growth begin?

• On the surface of the skin

• Inside the hair shaft

• Under the skin in hair follicles

• In the hair salon

What is the role of small blood vessels in hair growth?

• They provide nutrients for growth

• They remove dead cells

• They color the hair

• They make hair curly

What is the visible part of the hair called?

• Follicle

• Shaft

• Bulb

• Root

How many strands of hair do we typically lose each day?

• 50 to 100

• 30 to 40

• 10 to 20

• 200 to 300

What happens to hair after it falls out?

• It becomes thicker

• It never grows back

• It is replaced by new hair

• It changes color

How long does each hair grow before it falls out?

• 2 to 6 years

• 1 to 2 years

• Over 10 years

• 7 to 10 years

What should viewers do to engage with the video content?

• Share the video with friends

• Dislike the video

• Write the answer in the comments

• Ignore the video