Explain the birth in human biology, Biology

Assignment Help:

Explain the Birth in human biology?

In humans, birth of the infant occurs about 270 days after conception.

The period during which the uterus contracts to expel the newborn and the placenta is called labor. Sometimes, the first sign of labor is the rupture of the amnion and loss of amniotic fluid. The fluid escapes through the vagina. This is commonly referred to as when someone's "water breaks."

The beginning of labor is triggered by several stimuli. Toward the end of the third trimester of pregnancy, estrogen is produced in larger amounts, stimulating contractions of uterine muscle. The pituitary glands of both mother and fetus secrete oxytocin, that also stimulates uterine contraction. During this stage of labor, uterine contractions pull the cervix open (dilation) until it is large enough to allow the baby to pass through.

During the second stage, the baby's head moves into the vagina and is visible from the outside. As soon as the baby is out of the birth canal, it can breathe and can be independent of the mother's circulation, which is when the umbilical cord can be clamped and cut. The placenta and fetal membranes are expelled a few minutes to an hour after birth.

 


Related Discussions:- Explain the birth in human biology

Define work capacity that is relevant to sports nutrition, Define Work Capa...

Define Work Capacity that is relevant to sports nutrition? There are generally two areas of work capacity that is relevant to sports nutrition one is aerobic capacity and the o

Treatment of angina pectoris, Q. Treatment of angina pectoris? Proper a...

Q. Treatment of angina pectoris? Proper and careful treatment of the underlying cause (usually dyslipidemia, advanced atherosclerosis or sever chronic hypertension) is imperati

Tumours of kidney - wilm''s tomour, Tumours of kidney - Wilm's Tomour ...

Tumours of kidney - Wilm's Tomour So  far you have learnt about the disorders in glomerular dysfunctioning, now you will learn about the tumours in kidney the wilm's  tumour.

Why energy transfer between trophic level is not 100 percent, Give three re...

Give three reasons why energy transfer between trophic levels is not 100 percent. Some of the organisms in a trophic level escape being eaten; some energy is kept in molecules

Difference between "a" and "i" bands, DIFFERENCE S BETWEEN "A" AND "I" BAN...

DIFFERENCE S BETWEEN "A" AND "I" BANDS     A-Ban d (Anisotropic band)   I-Ban d (Isotropic band) 1. It

Amoebas, two types of amoebas waste and how they get rid of them

two types of amoebas waste and how they get rid of them

Explain what dietary factors, Michael eats steak & cheese sub sandwiches ev...

Michael eats steak & cheese sub sandwiches every day of the week. Explain the types of fats that are found in steak & cheese subs and the properties of each type. Jillian eats

What are taxonomic characters, What are Taxonomic characters Taxonomic...

What are Taxonomic characters Taxonomic characters Classification is done on the basis of information we have. More information gives better classification. Modern taxonomy

Secondary prevention - community mental health programme, Secondary Preven...

Secondary Prevention: The various aspects of  secondary prevention are:  1)  Early Diagnosis  and  Case Finding  This can be achieved by  educating the public and commun

Marine biomes, The marine biomes consist of the earth's oceans and its asso...

The marine biomes consist of the earth's oceans and its associated areas like the shorelines, islands, reefs and estuaries. The marine waters contain about 3.5 percent salt, mostly

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