MedicineNet.com
About Us | Privacy Policy | Site Map
February 10, 2010
MedicineNet home Picture Slideshows Diseases and conditions Symptoms and signs Procedures and tests Medications Picture Image Collection MedTerms medical dictionary Pet Health
Font Size
A
A
A

Definition of Placenta

Placenta: A temporary organ joining the mother and fetus, the placenta transfers oxygen and nutrients from the mother to the fetus, and permits the release of carbon dioxide and waste products from the fetus. It is roughly disk-shaped, and at full term measures about seven inches in diameter and a bit less than two inches thick. The upper surface of the placenta is smooth, while the under surface is rough. The placenta is rich in blood vessels.

The placenta is expelled during the birth process with the fetal membranes; together, these structures form the afterbirth.


Last Editorial Review: 3/26/1998 2:28:00 PM

Search All of MedicineNet For:
  


Printer-Friendly Format  |  Email to a Friend

Back to MedTerms online medical dictionary A-Z List

Parenting and Pregnancy

Get tips for baby and you.


Are you Depressed? Take the Quiz

Your Guide to Symptoms & Signs: Pinpoint Your Pain






Webster's New World
Medical Dictionary
Learn more »

Webster's New World Medical Dictionary

MedTerms Medical Word
of the Day XML







Health categories:

Slideshows | Diseases & Conditions | Symptoms & Signs | Procedures & Tests | Medications | Image Collection | Medical Dictionary | Pet Health

Popular health centers:

Allergies | Arthritis | Blood Pressure | Cancer | Chronic Pain | Cold & Flu | Diabetes | Digestion | Eyesight | Health & Living | Healthy Kids

Hearing & Ear | Heart | Infectious Disease | Men's Health | Mental Health | News & Views | Pregnancy | Sexual Health | Skin | Women's Health | More...

MedicineNet.com:

About Us | Newsletters | RSS Feeds | Privacy Policy | Site Map | WebMD® | Medscape® | eMedicine® | eMedicineHealth® | RxList®

This website is certified by Health On the Net Foundation. Click to verify. This site complies to the HONcode standard for trustworthy health information:
verify here.

©1996-2010 MedicineNet, Inc. All rights reserved. Notices and Legal Disclaimer.
MedicineNet does not provide medical advice, diagnosis or treatment. See additional information.