Quantcast Figure 1-5. Structure of a sperm cell. - Obstetrics Pediatrics

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
(a)  Description/information. Compared to a female ovum, a sperm cell
is very small, but it is well shaped to reach out and penetrate a female ovum. A sperm
cell has a head, a middle section, and a tail (figure 1-5). The head is flat and oval
shaped (ideal for penetration and attachment) and contains the nucleus of the cell. The
middle section is made up of substances that make useable energy to propel the tail.
And the long tail acts like a whip to move the sperm. When the head penetrates the
ovum, the tail separates from the rest of the sperm.
Figure 1-5. Structure of a sperm cell.
(b)  Chromosomes in a sperm cell. The nucleus in the head of a sperm
cell contains chromosomes. A mature sperm has 23 chromosomes. An immature
sperm cell has 46 chromosomes, one an X (female) chromosome and the other a Y
(male) chromosome. A reduction division takes place to form a mature cell which has
23 chromosomes. At that time, an X chromosome (female) goes to one sperm cell, and
a Y (male) chromosome goes to the other sperm cell. If an ovum is joined by a sperm
with an X chromosome, the combination will form a female. If a sperm with a Y
chromosome joins an ovum, a male is formed.
MD0584
1-10



Medical News
Risk of diabetes in children and adolescents exposed to antipsychotics
A study published in the September 2014 issue of the...
medicalxpress.com
Sickle cell is still a killer but this 50-cent test could change that
Every year, 300,000 children are born with sickle-cell disease, primarily...
medicalxpress.com
Researchers uncover hidden infection route of major bacterial pathogen
Researchers at the University of Liverpool's Institute of Infection and...
medicalxpress.com
High-dose rosuvastatin shrinks coronary plaque in heart attack patients 
One year of treatment with the highest dose of the...
medicalxpress.com
Team finds possible neurobiological basis for tradeoff between honesty, self-interest
What's the price of your integrity? Tell the truth; everyone...
medicalxpress.com
War between bacteria and phages benefits humans
In the battle between our immune systems and cholera bacteria,...
medicalxpress.com
Tobacco display bans protect youth and quitters
Ending the display and promotion of cigarettes and tobacco in...
medicalxpress.com
Monitoring work-related illnesses in Connecticut
As we mark the annual Labor Day holiday, Connecticut workers...
medicalxpress.com
Make the Diagnosis: Honeymoon Foot
(MedPage Today) -- A 31-year-old man presents with an intensely...
medpagetoday.com
Make the Diagnosis: Pitted Nails
(MedPage Today) -- A 35 year old woman presents to...
medpagetoday.com
Short-term peri-operative statin treatment does not reduce complications after cardiac surgery  
High-dose statin treatment around the time of cardiac surgery does...
medicalxpress.com
Medication improves short-term recovery after ablation for atrial fibrillation 
Patients undergoing radiofrequency ablation to treat a heart rhythm problem...
medicalxpress.com
Steroids raise cancer risk in TB-associated HIV 
The addition of steroids to tuberculosis (TB) therapy can offer...
medicalxpress.com
Being bilingual does not make you smarter, new study reports
The widely held belief that being bilingual makes you smarter...
medicalxpress.com
Childhood adoption experiences and the effect of those experiences later in adulthood
Adoptions have been running at record levels in the UK,...
medicalxpress.com
Pre-treatment with rivaroxaban may expedite cardioversion 
Oral anticoagulant therapy with rivaroxaban is a safe alternative to...
medicalxpress.com
Coffee increases prediabetes risk in susceptible young adults
Coffee increases the risk of prediabetes in young adults with...
medicalxpress.com
Research shows seven-year-olds can think strategically
(Medical Xpress)—A study by Melissa Koenig of the University of...
medicalxpress.com
Serelaxin reduces in-hospital worsening heart failure
Serelaxin reduces the occurrence of in-hospital worsening heart failure by...
medicalxpress.com
Polypill increases adherence to post MI treatment
A new polypill increases adherence to treatment following a myocardial...
medicalxpress.com
 


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +