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
fiasKO [112]
3 years ago
8

List and describe three stages of development of a fetus after conception.

Biology
2 answers:
Roman55 [17]3 years ago
7 0

Conception- This is when the egg and the sperm unite at conception, it is the fertilization and starts at the woman’s fallopian and the fertilized egg , First Trimester - First four weeks of the conception-, Second Trimester- This is 3 months after conception and this is where the baby can be felt kicking and can hear,Third Trimester- 28 weeks after conception and is having breathing movements and the women would be adding some body fat. If I am wrong please let me know

frosja888 [35]3 years ago
5 0

Answer:

The three stages of the development of a fetus include the first trimester, second trimester, and the third trimester.

First trimester- the baby is the most vulnerable, up to 25% of pregnancies end in a miscarriage. In the first four weeks, the zygote is still the same size of an apple seed, the spinal cord, central nervous system, digestive system, heart and lungs develop. In a couple weeks, the zygote becomes an embryo with moving legs and arms, a beating heart, and developing organs and buds that eventually become teeth. Fingerprints and sweat glands have developed. The placenta develops in this time. At eight weeks, the embryo is now a fetus and is the size of a grape. The embryonic tail is gone, the hands can bend at the wrist and the feet no longer look webbed.

Second Trimester- The chance of miscarriage is gone. At fourteen weeks, red blood cells begin to form in the spleen. Sixteen weeks, fingernails, toenails, hair, eyelashes, and eyebrows have formed. Can feel the baby kick because it is bigger. Fifteen weeks, the skeleton begins to harden. Twenty weeks, you can hear the heartbeat with a stethoscope and the circulatory system is functioning. Twenty two weeks, hair called lanugo covers the body. Twenty three weeks, the reproductive parts have developed. By the end of the second trimester, the fetus is eleven to fourteen inches long, has sleep-wake cycles, senses have developed, can recognize voices and eyelids can open.

Third Trimester- Babies born at twenty eight weeks have a 90% chance of survival, but aren't full term until thirty seven weeks. At twenty nine weeks, the skeleton is fully developed. Thirty two, it responds to sound, the brain continues to develop, lanugo hair falls off. Thirty three, pupils are responsive to light. Thirty five, the Uterus protective skin called Vernix Caseosa begins to thicken in preparation for birth.

You might be interested in
William Butler Yeats's poem "The Municipal Gallery Revisited" uses what type of rhyme?
ivann1987 [24]
<span>William Butler Yeats's poem "The Municipal Gallery Revisited" uses   the rhyme and these are
Slant rhyme
As the rhyme changes throughout the poem so it cannot be the strict one and it cannot also be the double or others 
so correct option is D
hope it helps</span>
4 0
3 years ago
Read 2 more answers
Which BEST describes the physical properties of the Earth’s core?
arlik [135]

Answer:A

Explanation:<em>The core is a solid in the  middle and molten on top of it</em>

3 0
3 years ago
Read 2 more answers
Convert 1,650,000 centimeters to kilometers. 1.65 kilometers 16.5 kilometers 165 kilometers 1,650 kilometers
xz_007 [3.2K]

Answer:

16.5 kilometers is the correct answer.

6 0
3 years ago
Read 2 more answers
Smallest unit of classification
lawyer [7]
The smallest unit is species
6 0
3 years ago
Cancer and allergies are examples of environmental influenced diseases. t/f
satela [25.4K]
<span>Cancer and allergies are examples of environmental influenced diseases.(true) i have had this answer before.
</span>
4 0
3 years ago
Other questions:
  • During what phase do sister chromatids move apart?
    7·1 answer
  • How many trna nucleotides form an anticodon that will attach to the mrna codon?
    14·1 answer
  • In conditions of stress or fear, the human adrenal gland may produce adrenaline. Which of the following is an effect adrenaline
    10·1 answer
  • Producers, like this plant, take in oxygen and release carbon dioxide during______,just like animals and other living things
    15·2 answers
  • What analogy is used to describe how cell replication is regulated?​
    11·1 answer
  • THERE ARE_________ LAWS IN BIOLOGY<br> A- 1<br> B- 2<br> C- 3<br> D- 4
    13·1 answer
  • What are the two main types of cells and where are they found in the human body?
    14·1 answer
  • A liquid and a solid mixed together. What does NOT indicate that a
    9·1 answer
  • Which action would best demonstrate that a scientist is being creative?
    8·1 answer
  • Name 2 reasons why bacteria are resistant to antibiotics?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!