Skip to main content

Fingerprints

No one in the world has a fingerprint completely identical to yours, past, present or future. This mainly stems from the fact that the formation of fingerprints has too many variables to be accounted for and can never be accurately predicted.



There are some general patterns that have been observed such as the loop, whorl, arch and the double loop whorl.

Early on in foetal development, lumps of stem cell tissue known as volar pads grow beneath the skin of each finger. The formation of volar pads is determined by genetics, which attributes to why some relatives share the same general design to you. Despite so, the uniqueness of each fingerprint does not stem from the DNA in your cells but rather the way your fingerprints grow.

Microscopically, the embryonic skin has 3 main layers; the epidermis, basal layer and the dermis. These layers are growing at different rates and are heavily affected by external variables. There are too many to account for, this makes the formation of fingerprints extremely chaotic and uncontrolled at the microscopic level. Such examples are fluid pressure changes in the womb, orientation of the foetus relative to the direction of gravity and the entropy of growing capillaries within the skin. With these variables in mind the probability of discovering 2 identical fingerprints are 1 in 64 trillion.

 

 

https://medlineplus.gov/genetics/understanding/traits/fingerprints/#:~:text=A%20person's%20fingerprints%20are%20based,the%20soles%20of%20the%20feet.&text=The%20basic%20size%2C%20shape%2C%20and,be%20influenced%20by%20genetic%20factors.

https://www.healthline.com/health/do-identical-twins-have-the-same-fingerprints#chances

https://www.youtube.com/watch?v=iCRy8voU5dE

Comments

Post a Comment

Popular posts from this blog

Horner’s Syndrome

Horner’s syndrome is a condition where the sympathetic nerves on the face are damaged. 3 classic signs of Horner’s syndrome include miosis (constriction of the pupil), ptosis (drooping of the upper eyelid) and anhidrosis (absence of sweating of the face). It is a result of other medical problems such as stroke, tumor or spinal cord injury. Hence, treatment for the underlying issue may restore nerve function. The nerve pathway affected in Horner’s syndrome is divided into three groups of neurons called the first, second and third order neurons. These neurons lead from the hypothalamus of the brain through the spinal cord and finally along the facial skin and muscles of the iris and eyelids  Sources: https://rarediseases.info.nih.gov/diseases/6670/ horners-syndrome
Post a Comment
Read more

Kidney Stones

Renal calculi, or kidney stones is the formation of crystals in the kidneys causing excretory issues. These stones mainly form in the renal pelvis or the ureter in the kidney. It is accompanied by symptoms such as nausea, vomiting and a burning sensation when urinating  Urine consists of salts and various compounds such as Calcium, Potassium, Sodium, Oxalate, Phosphate and Uric acid. Calcium oxalate is the most common stone formed in the kidneys, it accounts for 80% of kidney stones The crystals can scratch the walls of the urinary tract, sending nerve impulses to the brain causing excruciating abdominal pain. The scratches also cause blood vessels embedded behind the walls to burst, causing blood to enter the urinary system. This causes the patient to urinate blood. IF the stone is big enough to cause a blockage in the urinary tract, this can create a backflow of urine and infect the kidneys itselves. However, most kidney stones do not grow large enough to cause a blockage. This w...
Post a Comment
Read more

Cardiac Automaticity

Cardiac automaticity is the intrinsic ability of the heart to spontaneously depolarise, sending action potentials throughout heart muscles and myocardium. Unlike most organs in the human body, it does not require a nerve impulse to contract.  Surrounding the heart are nodal cells which send electrical signals throughout the heart. They comprise the following nerves in order: SA node, AV node, bundle of His, left and right bundle branches and the Purkinje fibres. The SA node (sinoatrial node) is the “pacemaker” and sets the rhythm for the heart. It sends action potential throughout the nodal cells, causing the myocytes to contract. This ability of intrinsically contracting is what makes heart transplants possible. Thus, only oxygen is needed to be supplied so that it can “live” outside the body. https://www.livescience.com/44460-heart-facts.html https://youtu.be/1kX6Tp8CWFw
Post a Comment
Read more