There may also be cause for concern if your period lasts more than seven days. On the flip side, abnormal uterine bleeding is also used to describe amenorrhea or the absence of menstruation. Some women are concerned, needlessly, by clots in their menstruation.
An organ is a unit composed of several tissue types. Outline. Organs are structures composed of two or more primary tissue types arranged in various proportions and pattern to perform a certain function or a range of functions. The lung is one example of an organ made up of all the four primary tissue types. The tissues that make up the lung function collectively to expand in order to draw air from the atmosphere, exchange oxygen in inhaled air with carbon dioxide from blood, eliminate/give off carbon dioxide and deliver oxygen to blood.
In biology, an organ or viscus is a collection of tissues joined in a structural unit to serve a common function. In anatomy, a viscus /ËvÉªskÉs/ is an internal organ, and viscera is the plural form. Organs are composed of main tissue, parenchyma, and sporadic tissues, stroma.The main tissue is that which is unique for the specific organ, such as the myocardium, the main tissue of the heart, while sporadic tissues include the nerves, blood vessels, and connective tissues.Functionally related organs often cooperate to form whole organ systems.n biology, an organ or viscus is a collection of tissues joined in a structural unit to serve a common function. In anatomy, a viscus /ËvÉªskÉs/ is an internal organ, and viscera is the plural form. Organs are composed of main tissue, parenchyma, and sporadic tissues, stroma.