Describe how hair and nails are formed

2 answers:

7 0

Each cell becomes a thin plate; these plates pile into layers to form the nail. As with hair, nails form by keratinization. When the nail cells accumulate, the nail pushes forward. The skin below the nail is the matrix.

Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin. In the hair bulb, living cells divide and grow to build the hair shaft. Blood vessels nourish the cells in the hair bulb, and deliver hormones that modify hair growth and structure at different times of life

Nails start in the nail root, hidden under the cuticle. When cells at the root of the nail grow, the new nail cells push out the old nail cells. These old cells flatten and harden, thanks to keratin, a protein made by these cells. The newly formed nail then slides along the nail bed, the flat surface under your nails.

bulgar [2K]2 years ago

5 0

Nails and hair are essentially made up of a tough protective protein called keratin. While the hair grows in a hair follicle, nails grow from the matrix (the base of the nail bed). ... They die and harden, thus turning into hair or nails. This process, called keratinisation, makes your hair and nails grow.

You might be interested in

Carbon atoms can form (2 points):

Jlenok [28]

Answer:

C. four single covalent bonds

Explanation:

Carbon atoms can form four single covalent bonds.

6 0

2 years ago

Read 2 more answers

ou find some rather strange plants in your backyard. They consist only of thin, pale yellow stems that are wrapped around other

deff fn [24]

Answer:

Parasitic

Explanation:

The plants that are described are typical example of parasitic plants. These types of plants have a parasitic relationship with the other plants, at least with the ones that they can use. In order for them to grow, survive, and prosper, these plants need a host plant. They attach to the host plant's steam with their miniature claw like organs, and use them for support to grow upwards, but also to extract nutrients from the host plant. While this leads to to parasitic plant's survival and prospering, the host plant is suffering, and gradually the parasitic plant will suck every nutrient out of the host plant and kill it. Without a host plant, these plants would find it extremely hard to survive, and the chances are very high that they will die because they are not well suited to get nutrient on their own.

5 0

3 years ago

What usually causes creep?

notsponge [240]

Soil creep is the downward movement of soil, on a slope, caused by the force of gravity. A slow deformation of soil material over a prolonged period of time, from pressure and stress. Creep occurs when the friction from materials resisting gravity move against each other. Slope is a key cause of soil creep.

6 0

2 years ago

QUESTION 2

motikmotik

Answer:

D. increasing the number of mitochondria

Explanation:

The mitochondria are membrane-bound cellular organelles found in the cell of an eukaryote. Mitochondrion is responsible for the production of energy since the process which releases the energy (cellular respiration) occurs in it.

In an experimental procedure whereby the amount of energy which is produced by a cell is about to be increased will involve the increase of the number of mitochondria in that cell. Since more mitochondria means more energy production.

3 0

3 years ago

A preliminary radiograph taken before contrast dye is injected is referred to as a/an ________.

Nana76 [90]

A scout film

<span>A scout film is the initial radiograph that is taken to provide an initial view of an area before contrast dye is injected. Scout film is a simple and definite procedure that helps in diagnosing conditions that are not true clinically.</span>

5 0

3 years ago