Female accessory sex organs, Biology

Female Accessory Sex Organs

The female accessories include oviducts or fallopian tubules as they are generally termed in the human subjects, the uterus, the vagina and the external genitalia. In mammals, oviducts provide a passageway between the ovary and uterus. The ovarian end of this tube is expanded into a funnel, having fimbriated margin. Some of the epithelial cells lining the tube possess cilia that beat inwardly. Beating of cilia together with the increased activity of the fimbria at the time of ovulation assist the movement of the ovum towards the uterus. Fertilisation typically occurs in the oviducts. In human beings fertilisation occurs usually within 24 hours after the egg has been released from the ovary. The primate uterus is a pear-shaped muscular organ.

The uterine wall is composed of a thick mass of smooth muscle cells called myometrium and glandular lining known as endometrium. The narrow caudal end of the uterus is called cervix. During pregnancy the uterine wall becomes highly modified to facilitate implantation of the blastocyst and its subsequent development. The human vagina is an unpaired, dilated tube approximately 4 inches in length extending from the caudal end of the uterus to the vestibule. The lining of the vagina is a stratified squamous epithelium devoid of glands. It has a very thin layer of muscles. The vagina does not provide a satisfactory environment for the survival of spermatozoa. In humans, they die within a few hours, whereas they may remain viable for two or three days in the uterus and fallopian tubes.

Posted Date: 1/16/2013 7:47:03 AM | Location : United States







Related Discussions:- Female accessory sex organs, Assignment Help, Ask Question on Female accessory sex organs, Get Answer, Expert's Help, Female accessory sex organs Discussions

Write discussion on Female accessory sex organs
Your posts are moderated
Related Questions
Q. Describe about Cardiomyopathy due to Persistent Tachycardia? In occasional cases, particularly in children recurrent or incessant episodes of supraventricular or ventricular

Based on your reading of the article "The Inner Life of the Genome" which of the following is a wrong statement regarding the organization of chromosomes within the nucleus? A.

what are the disadvantages of protozoa?

The physician orders 2 liters of lactated ringers over 16 hours. The drip factor of the tubing is 20 gtt/cc. What will be the flow rate? a. 33.33 or 34 gtt/min b. 41.66 or 42

Describe the mechanisms and genetic regulations that underpin how two cells such as cardiomyocyte and a motor neuron have identical gnomes, yet are functionally and structurally di

Determine some assessment measures of Zinc? Measurement of zinc in plasma: This is the most common method. Fasting concentrations of less than 70 μg/litre suggests deficie

Homologous structures are the body parts in different organisms which have similar bones and similar arrangements of the blood vessels, muscles, and nerves and go through similar

Role of Biotic Factors Inducing Senescence Besides environmental and endogenous factors, biotic factors also play a role in inducing senescence. For example, due to an attack

Ur o l it h i a s i s The presence of calculi (urolith) in the urinary system is termed as urolithiasis, and the disease is characterized by distension of bladder and

Why Meat and Poultry are important for human body? Meat and poultry are rich sources of proteins of high biological value. They do not contain carbohydrates. All