1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
pashok25 [27]
2 years ago
14

Describe how hair and nails are formed

Biology
2 answers:
Svetllana [295]2 years ago
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
Can you write a short summary about DNA. The main facts and purposes plz and thankyou... WILL UPVOTE
fiasKO [112]
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). <span>DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. Together, a base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix. The structure of the double helix is somewhat like a ladder, with the base pairs forming the ladder’s rungs and the sugar and phosphate molecules forming the vertical sidepieces of the ladder.</span>
7 0
3 years ago
'if a nation is rich in resources then it can be developed' justify the statement <br>​
antiseptic1488 [7]

Answer:then Nathan is rich

Explanation:

5 0
3 years ago
Human cells have 46 chromosomes. Each chromosome consists of a pair of identical chromatids attached together by a structure cal
eduard
10 chromosomes. After telophase and cytokinesis, the new daughter cells will each have 10 chromosomes, which is identical to the parental cell. Human cells have 23 pairs of chromosomes.
6 0
2 years ago
The average kinetic energy in an object or substance tells us its_______
Stolb23 [73]

Answer: The average kinetic energy in an object or substance tells us its mass. Kinetic energy has a direct relationship with mass, meaning that as mass increases so does the kinetic energy of an object.

6 0
3 years ago
The map shows average wind speeds throughout the United states
LekaFEV [45]

part 1: inconsistent


part 2: not uniformly available


hope this helps.

8 0
3 years ago
Other questions:
  • We are usually least consciously aware of the processes and functions of which brain structure?
    14·1 answer
  • Energy in the atom can be absorbed or released only in quanta of energy. True False
    7·1 answer
  • Types of commonly used drugs that are believed to lead to using other more powerful mind-altering and addictive drugs, such as h
    13·1 answer
  • What are graphs useful when interpreting data?​
    7·2 answers
  • How does the human body maintain itself during exercise? It releases sweat to heat up. It releases sweat to cool down. It absorb
    6·1 answer
  • Attraction between molecules of the same<br> substance solution
    9·1 answer
  • Since the human genome was first published in 2001, scientists have quickly improved genetic sequencing, generating genetic and
    15·1 answer
  • Which of the following is the correct order for the major parts of the gastrointestinal tract?
    10·1 answer
  • The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of ener
    14·1 answer
  • A student walls 2 km in 30 minutes. What is the student's average speee in km/h
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!