Final answer:
The three major types of hair in the integumentary system are B. vellus, terminal, and intermediate. Vellus hair is fine and short 'peach fuzz,' terminal hair is thicker and longer, and intermediate hair is in transition between vellus and terminal.
Step-by-step explanation:
The 3 Major Types of Hair
The question asks about the three major types of hair found in the integumentary system. The correct answer is B. Vellus, terminal, and intermediate. Let's define these types:
- Vellus hair is the fine, short, and lightly pigmented hair that covers most of the body. It's often referred to as 'peach fuzz.'
- Terminal hair is the fully developed hair, which is generally thicker, longer, more pigmented, and found in areas such as the scalp, eyebrows, and, after puberty, other areas of the body.
- Intermediate hair is hair that is in a transition phase between vellus and terminal hair.
Each hair type serves different roles in protecting the body and providing sensory input. For instance, head hair helps prevent heat loss and protects against UV radiation, while hairs in the nose help trap dust and microorganisms.