Recall that cardiac muscle shares a few characteristics with both skeletal muscle and smooth muscle, but it has some unique properties of its own. Not the least of these exceptional properties is its ability to initiate an electrical potential at a fixed rate that spreads rapidly from cell to cell to trigger the contractile mechanism. This property is known as autorhythmicity.
HealthDay —Despite what's often portrayed in movies and on TV, most women can't orgasm with penetration alone during sexual intercourse. And simple anatomy is to blame, a new evidence review suggests. Each woman's ability to orgasm during sex depends almost wholly on physical development that occurred while she was still in the womb, according to the review authors.
These parts are internal; the vagina meets the external organs at the vulva, which includes the labia, clitoris, and urethra. The vagina is attached to the uterus through the cervix, while the uterus is attached to the ovaries via the fallopian tubes. At certain intervals, the ovaries release an ovum, which passes through the fallopian tube into the uterus.
The vaginal corona — generally known as the hymen but renamed in by a Swedish sexual rights group in an attempt to dispel many of the myths surrounding hymens — is made up of thin, elastic folds of mucous membrane located just inside the entrance to the vagina. The vaginal corona has no known function; it is probably a remnant of fetal development. The mucous membrane that makes up the vaginal corona may be tightly or more loosely folded.
Sankhla, MD Michael T. Lawton, MD Joseph M. Zabramski, MD Robert F.
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Performing a smooth and clean sinus surgery goes hand in hand with a perfect understanding of the nasal and paranasal anatomy. Within this chapter, the paranasal and related structures surgical anatomy will be extensively reviewed, with emphasis on the anatomical landmarks and the normal anatomical variations, which have a significant impact on the function, pathology, and surgical procedures of the paranasal sinuses. Paranasal Sinuses.
The corneal epithelium is the outermost layer of the cornea. It is composed of a single layer of basal cells and cell layers of nonkeratinized, stratified squamous epithelial cells, which are held together by tight junctions, to form an effective barrier against fluid loss and pathogen penetration. The corneal epithelium develops from the head surface ectoderm overlying the developing lens.
Licensed under CC BY 3. V1 - Ophthalmic nerve: From Meckel's cave, it pierces the dura to enter the cavernous sinus, leaves the cranium via the superior orbital fissure and divides into nasociliary, frontal and lacrimal nerves. V2 - Maxillary Nerve: from meckel's cave, the nerve pierce the dura to enter the cavernous sinus and leaves the cranium via the foramen rotundum into the pterygopalatine fossa and gives off the infraorbital nerve, zygomatic nerve, nasopalatine nerve, superior alveolar nerves, palatine nerves, and pharyngeal nerve. Understand that the distal branches of the facial nerve enter the muscles of facial expression on the deep surfaces.