Age related differences in erythropoiesis, Science

Assignment Help:

Age Related Differences in Erythropoiesis

1. During intrauterine life, in the early embryo, erythropoiesis occurs in the mesoderm (the middle of the three germ layers of an embryo) of yolk sac. In a few weeks, the process shifts to the mesoderm of the body. During these stages, erythropoiesis is intravascular. It takes place by some endothelial cells undergoing transformation into blood cells and detaching themselves from the vessel wall to enter the circulation.

2. After the third intrauterine month, erythropoiesis takes place in the liver and spleen, in the mesenchymal tissue (embryonic connective tissue) between the blood vessels and tissue cells. After the fourth intrauterine month, the fetal bone marrow also starts manufacturing blood cell

3. By the time of birth, bone marrow takes over erythropoiesis completely.

Thus, all extrauterine (occurring outside the uterus) erythropoiesis is medullary, i.e., in  the bone marrow. Red  cells, white cells and platelets are made in the marrow of Bones.


Related Discussions:- Age related differences in erythropoiesis

Find the angle of incidence, a ray of light falls on a transparent slab of ...

a ray of light falls on a transparent slab of refractive index u.if the reflected and refracted rays are mutually perpendicular to each other,find the angle of incidence.

Explain cells as units of life , 1.  Define the cell theory.  2.  Contra...

1.  Define the cell theory.  2.  Contrast the light microscope with the transmission electron microscope. 3.  Describe the structure and function of the plasma membrane, chro

Importance of oxidation in weathering, Oxidation Weathering by oxidatio...

Oxidation Weathering by oxidation is common in rocks which are rich in the elements that can be easily oxidised e.g. iron.  Iron as Fe 2+ present in a mineral is oxidised to Fe

Psychology practicum, Mr. X is a 24-year-old Caucasian male. He denied suic...

Mr. X is a 24-year-old Caucasian male. He denied suicidal and homicidal ideation, and was not actively psychotic. He was well-groomed, clean-shaven, and dressed casually in jeans a

Solar wind and solar flare, Solar Wind and Solar Flare Most of  the S...

Solar Wind and Solar Flare Most of  the Sun's family is continually bathed in an outflow of material from the Sun's atmosphere. Streams of electrons and protons continuously

Types of soils, Types of soils Secure samples of soil from as many plac...

Types of soils Secure samples of soil from as many places as possible and place in glass jars. Try to get examples of a sandy soil, a loam soil, a clay soil, a soil rich in dec

Digetive, i need an assinment how do i find one

i need an assinment how do i find one

In what conditions an element is called an essential element, Under what co...

Under what conditions an element is called an essential element?   An element is called as an essential element, if:   a.  The plant can not complete its life cycle without it

Immune mechanisms - physiology of growth and development, Explain the Immun...

Explain the Immune mechanisms - Physiology of Growth and Development The immune system starts functioning in a baby through the inherited antibody (Ab) of the mother. But these

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd