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8 08, 2018

Major Body Cavities, Their Subdivisions And Membranes.

By Dr. Joseph H Volker | 2018-08-30T11:17:05+00:00 August 8th, 2018|General, Physiology|0 Comments

Body cavities are spaces inside the body which contain, protect, separate, and support internal organs. There are two major cavities of the body which contain internal organs: the dorsal (posterior) and ventral (anterior) cavities. The body cavities protect as well as cushion the contained organs and permit changes in their size and shape without affecting [...]

8 08, 2018

Mitosis and Its Phases

By Dr. Joseph H Volker | 2018-08-30T09:31:59+00:00 August 8th, 2018|General, Physiology|0 Comments

Cells divide by two mechanisms called mitosis and meiosis. Meiosis, however, is restricted to one purpose, the production of eggs and sperm, and is therefore not discussed here thoroughly. Mitosis serves all the other functions of cell division: development of an individual, composed of some 40 trillion cells, from a one-celled fertilized egg; growth of [...]

8 08, 2018

Structure of Cell – Membrane, Cytoplasm, and Organelles

By Dr. Joseph H Volker | 2018-08-30T08:48:17+00:00 August 8th, 2018|General, Physiology|0 Comments

All the living things are made up ofcells The human body is made up of about 75 trillion cells, the tiniest living systems that exist. Body cells can be categorized into about 300 types, such as neurons, epithelial cells, muscle cells, and red bloodcells Each type of cell has a special structure for carrying out [...]

8 08, 2018

Myocardial Physiology

By Dr. Joseph H Volker | 2018-08-30T08:57:08+00:00 August 8th, 2018|Cardiovascular System, General, Physiology|0 Comments

Myocardial cells have distinctive anatomic and physiologic characteristics. Under a microscope, striations are visible owing to the arrangement of actin and myosin as in skeletal muscle. T tubules increase the contact area of the cell membrane and extracellular fluid space. At rest, cardiac muscle obtains 99% of its energy from aerobic metabolism. Myocardial cells have [...]

8 08, 2018

Chromatin And Chromosomes

By Dr. Joseph H Volker | 2018-08-30T09:10:54+00:00 August 8th, 2018|General, Physiology|0 Comments

DNA does not exist as a naked double helix in the nucleus of a cell, however, is complexed with proteins to form a great filamentous material called chromatin. In many cells, the chromatin takes place as 46 long filaments called chromosomes. There is a stupendous quantity of DNA in one nucleus-- about 2 m (6 [...]

8 08, 2018

Abdominopelvic Quadrants And Regions

By Dr. Joseph H Volker | 2018-08-30T11:18:49+00:00 August 8th, 2018|General, Physiology|0 Comments

The abdominopelvic cavity is subdivided into either four quadrants or nine regions as an aid in locating organs. The four quadrants are right upper left upper right lower left lower The nine regions are epigastric right flank left hypochondriac hypogastric (pubic) right hypochondriac left inguinal umbilical right inguinal left flank. The abdominopelvic cavity is subdivided [...]

8 08, 2018

Stem Cells Types and Advantages

By Dr. Joseph H Volker | 2018-08-30T09:33:02+00:00 August 8th, 2018|General, Physiology|0 Comments

Stem cells are the primary cells capable of reforming themselves through mitotic division and differentiating into specialized cells. These cells serve as repair system of the body and are present in all multicellular organisms.   Types of Stem Cells Stem cells are of two types: Embryonic stem cells derived from embryo Adult stem cells derived [...]

8 08, 2018

Selectively Permeable Membrane Methods and Example

By Dr. Joseph H Volker | 2018-08-30T08:49:14+00:00 August 8th, 2018|General, Physiology|0 Comments

The plasma membrane is both a barrier and entrance in between the cytoplasm and ECF. It is selectively permeable-- it permits some things through, such as nutrients and wastes, however generally avoids other things, such as proteins and phosphates, from going into or leaving the cell. The techniques of moving substances through the membrane can [...]

8 08, 2018

Immunity Or Specific Resistance – Cell-Mediated Immunity And Antibody-Mediated Immunity

By Dr. Joseph H Volker | 2018-08-30T09:32:16+00:00 August 8th, 2018|General, Immunity System, Physiology|0 Comments

In contrast to nonspecific resistance, immunity (i-mu- ni-te), or specific resistance, is directed at specific antigens. An immune response involves the production of specific cells and substances to attack a specific antigen. Immunity has "memory," that is, if the same pathogen should reenter the body at a later date, the immune response is quicker and [...]

8 08, 2018

RNA Structure, Function, Synthesis, Types and Interference

By Dr. Joseph H Volker | 2018-08-30T09:12:07+00:00 August 8th, 2018|General, Physiology|0 Comments

There many types of RNA in a cell Nevertheless, we will focus on the three that are straight related to producing proteins: messenger RNA (mRNA), ribosomal RNA (rRNA), and transfer RNA (tRNA). DNA can not produce proteins without their help. The other RNA types play various regulative roles that we will dismiss. The most significant [...]