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TE**ESBy Chipo James MaindaA testicle is part of the anatomy of men and people assigned male at birth. Generally, you’ll...
11/08/2026

TE**ES

By Chipo James Mainda

A testicle is part of the anatomy of men and people assigned male at birth. Generally, you’ll have two testicles. These body parts make s***m and hormones. Other names for the testicles are male go**ds or te**es. One testicle is called a te**is. There are other more casual names for testicles that you might hear or even use yourself, including “balls,” “nuts” and “cojones.”

The testicles are located underneath the p***s. They’re enclosed in a pouch of skin called the sc***um. Generally, you’ll have one testicle to the right and one testicle to the left of your p***s.

The testicles are connected to the inside of the body by a cord called the s***matic cord. Each cord contains nerves and blood vessels. The cords also contain the vas deferens, which are the tubes that move s***m to the p***s, so it can leave the body in semen.

There’s no exact size for testicles. In fact, one of the testicles may be a little bit bigger than the other one. One testicle might be a little lower than the other. An adult testicle may range from half an inch to 1.5 inches or more. One comparison says the normal range goes from the size of a bird egg to the size of a small chicken egg.

The testicles make s***m and s*x hormones, particularly testosterone. Testosterone is a hormone that causes people to have deeper voices, stronger muscles and body hair. Testicles are about 2°C lower in temperature than the rest of the body.

Cooler temperatures are better for making s***m, a process called s***matogenesis. In each of the te**es, the process happens in tubes called seminiferous tubules. There are a surprising number of tubes in each te**is, about 700.

It takes about 74 days for s***m cells to mature. The immature cells get the blood and nutrients they need in the tubules. From there, they’re pushed along to the epididymis, another type of tube that runs along the back side of the testicle. The epididymis connects to the vas deferens, which is the tube that lets s***m leave the body through the p***s.

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AUTISMBy Chipo James MaindaAutism spectrum disorder (ASD) is a neurological and developmental disorder that affects how ...
10/08/2026

AUTISM

By Chipo James Mainda

Autism spectrum disorder (ASD) is a neurological and developmental disorder that affects how people interact with others, communicate, learn, and behave. Although autism can be diagnosed at any age, it is described as a “developmental disorder” because symptoms generally appear in the first 2 years of life.

Being autistic does not mean you have an illness or disease. It means your brain works in a different way from other people. Autism is not a medical condition with treatments or a "cure". But some people need support to help them with certain things.

People with autism may behave, communicate, interact, and learn in ways that are different from most other people. There is often nothing about how they look that sets them apart from other people. The abilities of children with autism can vary significantly.

For example, some children with autism may have advanced conversation skills whereas others may be nonverbal. Some people with autism need a lot of help in their daily lives; others can work and live with little to no support.

There is not just one cause of autism. There are many different factors that have been identified that may make a child more likely to have autism, including environmental, biologic, and genetic factors. Although we know little about specific causes, the available evidence suggests that the following may put children at greater risk for developing autism:

* Having a sibling with autism
* Having certain genetic or chromosomal conditions, such as fragile X syndrome or tuberous sclerosis
* Experiencing complications at birth
* Being born to older parents

People with autism often have problems with social communication and interaction, and restricted or repetitive behaviors or interests. Children with autism may also have different ways of learning, moving, or paying attention.

These characteristics can make life very challenging. It is important to note that some people without autism might also have some of these symptoms.

Diagnosing autism can be difficult since there is no medical test, like a blood test, to diagnose the disorder. Doctors look at the child’s behavior and development to make a diagnosis. Autism can sometimes be detected at 18 months of age or younger. By age 2, a diagnosis by an experienced professional can be considered reliable.

However, many children do not receive a final diagnosis until they are much older. Some people are not diagnosed until they are adolescents or adults. This delay means that people with autism might not get the early help they need.

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The greatest challenge for students "Circle of Willis"
09/08/2026

The greatest challenge for students "Circle of Willis"

EXOPHTHALMOSBy Chipo James MaindaExophthalmos (also known as proptosis) is a bulging of the eye anteriorly out of the or...
08/08/2026

EXOPHTHALMOS

By Chipo James Mainda

Exophthalmos (also known as proptosis) is a bulging of the eye anteriorly out of the orbit. Since the orbit is closed off posteriorly, medially and laterally, any enlargement of structures located within will cause the anterior displacement of the eye.

Exophthalmos can be either bilateral (as is often seen in Graves' disease) or unilateral (as is often seen in an orbital tumor). Complete or partial dislocation from the orbit is also possible from trauma or swelling of surrounding tissue resulting from trauma.

In the case of Graves' disease, the displacement of the eye results from abnormal connective tissue deposition in the orbit and extraocular muscles, which can be visualized by CT scan or MRI.

If left untreated, exophthalmos can cause the eyelids to fail to close during sleep, leading to corneal dryness and damage. Another possible complication is a form of redness or irritation called superior limbic keratoconjunctivitis, in which the area above the cornea becomes inflamed as a result of increased friction when blinking.

The process that is causing the displacement of the eye may also compress the optic nerve or ophthalmic artery, and lead to blindness.

In adults, the most common cause of unilateral and bilateral exophthalmos is thyroid-associated eye disease, such as Graves-related ophthalmopathy.

In children, orbital cellulitis is the most common cause, whereas bilateral exophthalmos is most likely due to neuroblastoma and leukemia.

Measurement of the degree of exophthalmos is performed using an exophthalmometer. Most sources define exophthalmos/proptosis as a protrusion of the globe greater than 18 mm.

The term exophthalmos is often used when describing proptosis associated with Graves' disease.
Treatment of the underlying cause is necessary for the management of exophthalmos to maintain ocular function.

In the case of thyroid-associated orbitopathy and other secondary causes, effective management requires an interprofessional approach between eye specialists, primary care clinicians and, endocrinologists.

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PROGERIABy Chipo James MaindaProgeria, also known as Hutchinson-Gilford syndrome, is an extremely rare, progressive gene...
07/08/2026

PROGERIA

By Chipo James Mainda

Progeria, also known as Hutchinson-Gilford syndrome, is an extremely rare, progressive genetic disorder that causes children to age rapidly, starting in their first two years of life. Children with progeria generally appear normal at birth. During the first year, signs and symptoms, such as slow growth and hair loss, begin to appear.

Heart problems or strokes are the eventual cause of death in most children with progeria. The average life expectancy for a child with progeria is about 13 years. Some with the disease may die younger and others may live longer, even up to 20 years. There's no cure for progeria, but ongoing research shows some promise for treatment.

A single gene mutation is responsible for progeria. The gene, known as lamin A (LMNA), makes a protein necessary for holding the center (nucleus) of a cell together. When this gene has a defect (mutation), an abnormal form of the lamin A protein called progerin is produced and makes cells unstable. This appears to lead to progeria's aging process.

There are no known factors, such as lifestyle or environmental issues, which increase the risk of having progeria or of giving birth to a child with progeria. Progeria is extremely rare. For parents who have had one child with progeria, the chances of having a second child with progeria are about 2 to 3 percent.

Unlike many genetic mutations, progeria is rarely passed down in families. The gene mutation is a rare, chance occurrence in the majority of cases

Usually within the first year of life, growth of a child with progeria slows markedly, but motor development and intelligence remain normal. Signs and symptoms of this progressive disorder include a distinctive appearance:

* Slowed growth, with below-average height and weight
* Narrowed face, small lower jaw, thin lips and beaked nose
* Head disproportionately large for the face
* Prominent eyes and incomplete closure of the eyelids
* Hair loss, including eyelashes and eyebrows
* Thinning, spotty, wrinkled skin
* Visible veins
* High-pitched voice

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06/08/2026

You might think school is hard, kanshi walikwata learning disorder 😂

VULNERABLE POPULATIONBy Chipo James MaindaVulnerable populations include the economically disadvantaged, racial and ethn...
06/08/2026

VULNERABLE POPULATION

By Chipo James Mainda

Vulnerable populations include the economically disadvantaged, racial and ethnic minorities, the uninsured, low-income children, the elderly, the homeless, those with human immunodeficiency virus (HIV), and those with other chronic health conditions, including severe mental illness.

It may also include rural residents, who often encounter barriers to accessing healthcare services. The vulnerability of these individuals is enhanced by race, ethnicity, age, s*x, and factors such as income, insurance coverage (or lack thereof), and absence of a usual source of care.

Their health and healthcare problems intersect with social factors, including housing, poverty, and inadequate education.

The health domains of vulnerable populations can be divided into 3 categories:
* Physical
* Psychological
* Social

✓ Physical vulnerable population

Are those with physical needs such as high-risk mothers and infants, the chronically ill and disabled, and persons living with HIV/acquired immunodeficiency syndrome. Chronic medical conditions include respiratory diseases, diabetes, hypertension, dyslipidemia, and heart disease.

87% of those 65 years and older have 1 or more chronic conditions, and 67% of this population have 2 or more chronic illnesses.

✓ Psychological vulnerable population

In the psychological domain, vulnerable populations include those with chronic mental conditions, such as schizophrenia, bipolar disorder, major depression, and attention-deficit/hyperactivity disorder, as well as those with a history of alcohol and/or substance abuse and those who are suicidal or prone to homelessness.

✓ Social vulnerable population

In the social realm, vulnerable populations include those living in abusive families, the homeless, immigrants, and refugees.

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PERSONALITY DEVELOPMENTBy Chipo James MaindaPersonality development is defined as a process of developing and enhancing ...
05/08/2026

PERSONALITY DEVELOPMENT

By Chipo James Mainda

Personality development is defined as a process of developing and enhancing one’s personality. Personality development helps an individual to gain confidence and high self esteem.

Every individual has his own characteristic way of behaving, responding to emotions, perceiving things and looking at the world. No two individuals are similar. You might like going out for parties but your friend might prefer staying back at home reading his/her favourite book. It is really not necessary that if you like partying around, your friend will also like the same. Here comes the role of personality.

What an individual sees in his childhood days and most importantly his/her growing days form his personality. How an individual is raised plays an important role in shaping his/her personality.

Personality is nothing but the aggregate conglomeration of memories and incidents in an individual’s entire life span. Environmental factors, family background, financial conditions, genetic factors, situations and circumstances also contribute to an individual’s personality.

In a layman’s language, how we behave in our day to day lives reflects our personality. How an individual behaves depends on his family background, upbringing, social status and so on.

An individual with a troubled childhood would not open up easily. He/she would always hesitate to open his heart in front of others. Some kind of fear would always be there within him. An individual who never had any major problems in life would be an extrovert and would never have issues interacting and socializing with others.

Personality also influences what we think, our beliefs, values and expectations. What we think about others depends on our personality. Following are the factors which help in shaping one’s personality:

✓ Heredity

Heredity refers to factors that are determined once an individual is born. An individual’s physique, attractiveness, body type, complexion, body weight depend on his/her parents biological makeup.

✓ Environment

The environment to which an individual is subjected to during his growing years plays an important role in determining his/her personality. The varied cultures in which we are brought up and our family backgrounds have a crucial role in shaping our personalities.

✓ Situation

An individual’s personality also changes with current circumstances and situations. An individual would behave in a different way when he/she has enough savings with him and his behavior would automatically change when he is bankrupt.

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Can oxygen cylinder/tank explode if dropped?
04/08/2026

Can oxygen cylinder/tank explode if dropped?

CARDIAC CONDUCTION SYSTEMBy Chipo James MaindaThe heart has areas that initiate and distribute impulses through out the ...
03/08/2026

CARDIAC CONDUCTION SYSTEM

By Chipo James Mainda

The heart has areas that initiate and distribute impulses through out the myocardium. The electrical system is made up of four main parts:

* The sinoatrial (SA) node, located in the right atrium of the heart. The SA node is called the natural pacemaker.
* The atrioventricular (AV) node, located on the right side of the interatrial septum.
* The bundles of His, located in the septum.
* Purkinje fiber system, located along the walls of the heart's ventricles.

The electrical signal in the Sinoatrial (SA) node is generated as the vena cava fills the heart's right atrium with deoxygenated blood from other parts of the body. The electrical signal spreads across the cells of the heart's right and left atria.

This signal causes the atria to contract pushing blood through the open valves from the atria into both ventricles. The signal arrives at the atrioventricular (AV) node near the ventricles.

It slows for an instant to allow the heart's right and left ventricles to fill with blood. The electrical signal is released and moves along a pathway called the bundle of His, which is located in the walls of the heart's ventricles (septum).

From the bundle of His, the signal fibers divide into left and right bundle branches and finally into the Purkinje fibers. The electrical signal spreads across the cells of the ventricle walls, and both ventricles contract.

This pushes blood through the pulmonary valve (for the right ventricle) to the lungs and through the aortic valve (for the left ventricle) to the rest of the body. As the signal passes, the walls of the ventricles relax and await the next signal.

This process continues over and over as the atria refill with blood and more electrical signals come from the sinoatrial (SA) node. The heart’s electrical activity is recorded by an electrocardiogram known as ECG.

The resulting pattern of these electrical activities can be traced onto paper and is called electrocardiograph. The trace has three phases namely the:
* P wave
* QRS complex
* T wave.

The P wave represents the depolarization (contraction) of the atria and the QRS complex, represents the depolarization of the ventricles. The T wave represents the repolarisation (relaxation) of the ventricles.

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