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Vasa Vasorum

By | 2018-02-14T09:42:13+00:00 February 9th, 2018|Physiology|

The Vasa vasorum is found in large arteries as well as veins like the aorta along with its branches. 3-dimensional micro-computed tomography has shown that there are three different types of Vasa vasorum in human arteries via various vascular beds: Vasa vasorum internae emerge directly from the main lumen of the artery and then branch [...]

Arachnoid Villi and Arachnoid Granulations

By | 2018-02-14T09:44:02+00:00 February 9th, 2018|Physiology|

Arachnoid villi originate from the surface of arachnoid mater and are thin finger-like projections. Human arachnoid villi have four parts: Fibrous capsule Arachnoid cell layer Cap cell cluster Central core They eventually perforate dura in order to project within the dural venous sinuses, before that they move the dura before them. Specific mesothelial cells that [...]

Sensory – Motor Functions and Neurons

By | 2018-02-01T06:31:23+00:00 January 25th, 2018|Physiology|

Neurons come in numerous sizes. For instance, a single sensory neuron from your fingertip has an axon that spreads out the length of your arm, while neurons within the brain may extend just a couple of millimeters. They also have different shapes depending upon their functions. Motor neurons that regulate muscle contractions have a cell [...]

The Systemic Circulation

By | 2018-02-01T06:33:11+00:00 January 8th, 2018|Physiology|

Systemic circulation is the part of the cardiovascular system which: Carries oxygenated blood away from the heart via the aorta from the left ventricle towards the rest of the body. Brings back deoxygenated blood towards the heart. The systemic circuit, which contains about 84 percent of the total blood volume at any given movement, starts [...]

Pulmonary Circuit

By | 2018-02-01T06:38:11+00:00 January 8th, 2018|Physiology|

The cardiovascular system is categorized into the pulmonary circuit as well as the systemic circuit. The blood among the heart and the lungs is transported by pulmonary circuit, which is made up of arteries and veins. The circuit starts at the right ventricle and terminates at the left atrium. The arteries of the systemic circuit [...]

Articulations – Immovable, Slightly Movable, or Freely Movable Joints

By | 2017-08-08T17:23:18+00:00 July 24th, 2017|Physiology|

The junction between two bones or between a bone and a tooth forms an articulation, or joint. Joints allow varying degrees of movement and are categorised as immovable, slightly movable, or freely movable. Immovable Joints Bones forming an immovable joint, or synarthrosis (sin-ar-thro'-sis), are tightly joined and are separated by a thin band of dense [...]

Nervous Tissue

By | 2017-06-01T08:43:46+00:00 July 24th, 2017|Physiology|

The nervous system consists of organs composed primarily of nervous tissue supported and protected by connective tissues. There are two types of cells that compose nervous tissue: neurons and neuroglia. Neurons Neurons, or nerve cells, are the structural and functional units of the nervous system. They are delicate cells that are specialized to generate and [...]

Epidermis And Accessory Structure Formed By The Epidermis And Their Functions

By | 2017-06-24T11:07:15+00:00 July 24th, 2017|Physiology|

The epidermis is a keratinized stratified squamous epithelium. An epithelium is avascular, meaning it lacks blood vessels. Since the epidermis is prone to injury, the lack of blood vessels prevents unnecessary found only in areas subjected to high levels of abrasion, such as the palms and soles. The thickness of the epidermis ranges from 0.04 [...]

Disorders of The Skeletal System, Bones and Joints

By | 2017-06-02T18:14:57+00:00 July 24th, 2017|Physiology|

Common disorders of the skeletal system may be categorised as disorders of bones or disorders of joints. Orthopaedics (or-tho-pe-diks) is the branch of medicine that specialises in treating diseases and abnormalities of the skeletal system.   Disorders of Bones Fractures are broken bones. Fractures are the most common type of bone injury. Fractures are categorised [...]